From eb64cc60c57ff6146ffc388b21ce0d11e55785bd Mon Sep 17 00:00:00 2001
From: Eyck Jentzsch <eyck@minres.com>
Date: Sat, 9 Jan 2021 12:43:02 +0100
Subject: [PATCH] fix copyright header, javadoc, and warnings

---
 .../scviewer/database/sqlite/TxGenerator.java |   1 +
 .../scviewer/database/sqlite/TxStream.java    |   7 -
 .../db/SQLiteDatabaseSelectHandler.java       |   6 +-
 .../database/text/AbstractTxStream.java       | 130 ++++--
 .../scviewer/database/text/ScvRelation.java   |  34 +-
 .../minres/scviewer/database/text/ScvTx.java  |  59 ++-
 .../scviewer/database/text/TextDbLoader.java  | 421 ++++++++++++------
 .../com/minres/scviewer/database/text/Tx.java | 161 +++++--
 .../scviewer/database/text/TxAttribute.java   |  48 +-
 .../database/text/TxAttributeType.java        |  50 ++-
 .../scviewer/database/text/TxEvent.java       |  74 ++-
 .../scviewer/database/text/TxGenerator.java   |  74 ++-
 .../scviewer/database/text/TxRelation.java    |  40 +-
 .../scviewer/database/text/TxStream.java      |  78 +++-
 .../build.properties                          |   2 +-
 .../scviewer/database/AssociationType.java    |  14 +-
 .../minres/scviewer/database/BitValue.java    | 171 ++++---
 .../minres/scviewer/database/BitVector.java   | 133 ++++--
 .../minres/scviewer/database/DataType.java    |  54 ++-
 .../minres/scviewer/database/DoubleVal.java   |  39 +-
 .../minres/scviewer/database/EventKind.java   |  21 +-
 .../minres/scviewer/database/HierNode.java    | 104 ++++-
 .../scviewer/database/IDerivedWaveform.java   |   5 +
 .../com/minres/scviewer/database/IEvent.java  |  31 +-
 .../minres/scviewer/database/IHierNode.java   |  23 +-
 .../minres/scviewer/database/IWaveform.java   |  56 ++-
 .../minres/scviewer/database/IWaveformDb.java |  49 +-
 .../scviewer/database/IWaveformDbFactory.java |  10 +-
 .../scviewer/database/IWaveformDbLoader.java  |  65 ++-
 .../database/InputFormatException.java        |   9 +-
 .../scviewer/database/RelationType.java       |  54 ++-
 .../database/RelationTypeFactory.java         |  38 +-
 .../scviewer/database/WaveformType.java       |  21 +-
 .../database/internal/WaveformDb.java         | 148 ++++--
 .../database/internal/WaveformDbFactory.java  |  14 +-
 .../com/minres/scviewer/database/tx/ITx.java  |  66 ++-
 .../scviewer/database/tx/ITxAttribute.java    |  11 +-
 .../database/tx/ITxAttributeType.java         |  23 +-
 .../minres/scviewer/database/tx/ITxEvent.java |  19 +-
 .../scviewer/database/tx/ITxGenerator.java    |  10 +-
 .../scviewer/database/tx/ITxRelation.java     |  24 +-
 41 files changed, 1856 insertions(+), 541 deletions(-)

diff --git a/plugins/com.minres.scviewer.database.sqlite/src/com/minres/scviewer/database/sqlite/TxGenerator.java b/plugins/com.minres.scviewer.database.sqlite/src/com/minres/scviewer/database/sqlite/TxGenerator.java
index 1b5dd38..bad29aa 100644
--- a/plugins/com.minres.scviewer.database.sqlite/src/com/minres/scviewer/database/sqlite/TxGenerator.java
+++ b/plugins/com.minres.scviewer.database.sqlite/src/com/minres/scviewer/database/sqlite/TxGenerator.java
@@ -36,6 +36,7 @@ public class TxGenerator extends AbstractTxStream implements ITxGenerator {
 		super(database, scvGenerator.getName(), stream.getId());
 		this.stream=stream;
 		this.scvGenerator=scvGenerator;
+		stream.addChild(this);
 	}
 
 	@Override
diff --git a/plugins/com.minres.scviewer.database.sqlite/src/com/minres/scviewer/database/sqlite/TxStream.java b/plugins/com.minres.scviewer.database.sqlite/src/com/minres/scviewer/database/sqlite/TxStream.java
index dbbf6ab..0d821ba 100644
--- a/plugins/com.minres.scviewer.database.sqlite/src/com/minres/scviewer/database/sqlite/TxStream.java
+++ b/plugins/com.minres.scviewer.database.sqlite/src/com/minres/scviewer/database/sqlite/TxStream.java
@@ -16,17 +16,10 @@ import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
-import java.util.Map.Entry;
-import java.util.NavigableMap;
 import java.util.TreeMap;
 
-import com.minres.scviewer.database.EventKind;
-import com.minres.scviewer.database.HierNode;
 import com.minres.scviewer.database.IEvent;
 import com.minres.scviewer.database.IWaveform;
-import com.minres.scviewer.database.RelationType;
-import com.minres.scviewer.database.RelationTypeFactory;
-import com.minres.scviewer.database.WaveformType;
 import com.minres.scviewer.database.sqlite.db.IDatabase;
 import com.minres.scviewer.database.sqlite.db.SQLiteDatabaseSelectHandler;
 import com.minres.scviewer.database.sqlite.tables.ScvGenerator;
diff --git a/plugins/com.minres.scviewer.database.sqlite/src/com/minres/scviewer/database/sqlite/db/SQLiteDatabaseSelectHandler.java b/plugins/com.minres.scviewer.database.sqlite/src/com/minres/scviewer/database/sqlite/db/SQLiteDatabaseSelectHandler.java
index 6b92957..17d861b 100644
--- a/plugins/com.minres.scviewer.database.sqlite/src/com/minres/scviewer/database/sqlite/db/SQLiteDatabaseSelectHandler.java
+++ b/plugins/com.minres.scviewer.database.sqlite/src/com/minres/scviewer/database/sqlite/db/SQLiteDatabaseSelectHandler.java
@@ -77,7 +77,6 @@ public class SQLiteDatabaseSelectHandler<T> extends AbstractDatabaseHandler<T> {
 	 * @throws InvocationTargetException
 	 */
 	public synchronized List<T> selectObjects() throws SQLException,
-			SecurityException, IllegalArgumentException,
 			InstantiationException, IllegalAccessException,
 			IntrospectionException, InvocationTargetException {
 
@@ -116,12 +115,11 @@ public class SQLiteDatabaseSelectHandler<T> extends AbstractDatabaseHandler<T> {
 	 * @throws InvocationTargetException
 	 */
 	private List<T> createObjects(ResultSet resultSet)
-			throws SecurityException, IllegalArgumentException,
-			SQLException, InstantiationException,
+			throws SQLException, InstantiationException,
 			IllegalAccessException, IntrospectionException,
 			InvocationTargetException {
 
-		List<T> list = new ArrayList<T>();
+		List<T> list = new ArrayList<>();
 
 		while (resultSet.next()) {
 
diff --git a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/AbstractTxStream.java b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/AbstractTxStream.java
index 9c9e9b5..425e607 100644
--- a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/AbstractTxStream.java
+++ b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/AbstractTxStream.java
@@ -1,5 +1,6 @@
 /*******************************************************************************
- * Copyright (c) 2012 IT Just working.
+ * Copyright (c) 2012 IT Just working
+ * Copyright (c) 2020 MINRES Technologies GmbH
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -12,7 +13,6 @@ package com.minres.scviewer.database.text;
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.List;
 import java.util.Map.Entry;
 import java.util.NavigableMap;
 import java.util.TreeMap;
@@ -23,105 +23,137 @@ import com.minres.scviewer.database.IEvent;
 import com.minres.scviewer.database.IWaveform;
 import com.minres.scviewer.database.WaveformType;
 import com.minres.scviewer.database.tx.ITxEvent;
-import com.minres.scviewer.database.tx.ITxGenerator;
 
+/**
+ * The Class AbstractTxStream.
+ */
 abstract class AbstractTxStream extends HierNode implements IWaveform {
 
+	/** The id. */
 	private Long id;
-			
+
+	/** The loader. */
 	protected TextDbLoader loader;
-		
+
+	/** The events. */
 	TreeMap<Long, IEvent[]> events = new TreeMap<>();
 
-	private int maxConcurrency = 0;
-	
-	private int concurrency = 0;
- 
+	/** The concurrency calculated. */
 	boolean concurrencyCalculated = false;
- 
+
+	/**
+	 * Instantiates a new abstract tx stream.
+	 *
+	 * @param loader the loader
+	 * @param id     the id
+	 * @param name   the name
+	 */
 	public AbstractTxStream(TextDbLoader loader, Long id, String name) {
 		super(name);
-		this.loader=loader;
-		this.id=id;
-	}
-
-	void setConcurrency(int concurrency) {
-		this.concurrency = concurrency;
-		if(concurrency>maxConcurrency)
-			maxConcurrency = concurrency;
-	}
-
-	int getConcurrency() {
-		return this.concurrency;
-	}
-
-	
-	@Override
-	public int getWidth() {
-		return maxConcurrency;
+		this.loader = loader;
+		this.id = id;
 	}
 
+	/**
+	 * Adds the event.
+	 *
+	 * @param evt the evt
+	 */
 	public void addEvent(ITxEvent evt) {
-		if(!events.containsKey(evt.getTime()))
-			events.put(evt.getTime(), new IEvent[] {evt});
+		if (!events.containsKey(evt.getTime()))
+			events.put(evt.getTime(), new IEvent[] { evt });
 		else {
 			IEvent[] evts = events.get(evt.getTime());
-			IEvent[] newEvts = Arrays.copyOf(evts, evts.length+1);
-			newEvts[evts.length]=evt;
+			IEvent[] newEvts = Arrays.copyOf(evts, evts.length + 1);
+			newEvts[evts.length] = evt;
 			events.put(evt.getTime(), newEvts);
 		}
 	}
-	
+
+	/**
+	 * Gets the events.
+	 *
+	 * @return the events
+	 */
 	@Override
 	public NavigableMap<Long, IEvent[]> getEvents() {
-		if(!concurrencyCalculated) calculateConcurrency();
+		if (!concurrencyCalculated)
+			calculateConcurrency();
 		return events;
 	}
 
+	/**
+	 * Gets the events at time.
+	 *
+	 * @param time the time
+	 * @return the events at time
+	 */
 	@Override
 	public IEvent[] getEventsAtTime(Long time) {
-		if(!concurrencyCalculated) calculateConcurrency();
+		if (!concurrencyCalculated)
+			calculateConcurrency();
 		return events.get(time);
 	}
-	
+
+	/**
+	 * Gets the events before time.
+	 *
+	 * @param time the time
+	 * @return the events before time
+	 */
 	@Override
 	public IEvent[] getEventsBeforeTime(Long time) {
-		if(!concurrencyCalculated)
+		if (!concurrencyCalculated)
 			calculateConcurrency();
-    	Entry<Long, IEvent[]> e = events.floorEntry(time);
-    	if(e==null)
-    		return new IEvent[] {};
-    	else
-    		return  events.floorEntry(time).getValue();
+		Entry<Long, IEvent[]> e = events.floorEntry(time);
+		if (e == null)
+			return new IEvent[] {};
+		else
+			return events.floorEntry(time).getValue();
 	}
 
+	/**
+	 * Gets the type.
+	 *
+	 * @return the type
+	 */
 	@Override
 	public WaveformType getType() {
 		return WaveformType.TRANSACTION;
 	}
 
+	/**
+	 * Gets the id.
+	 *
+	 * @return the id
+	 */
 	@Override
 	public Long getId() {
 		return id;
 	}
 
+	/**
+	 * Calculate concurrency.
+	 */
 	synchronized void calculateConcurrency() {
-		if(concurrencyCalculated) return;
+		if (concurrencyCalculated)
+			return;
 		ArrayList<Long> rowendtime = new ArrayList<>();
-		events.entrySet().stream().forEach( entry -> {
+		events.entrySet().stream().forEach(entry -> {
 			IEvent[] values = entry.getValue();
-			Arrays.asList(values).stream().filter(e->e.getKind()==EventKind.BEGIN).forEach(evt -> {
-				Tx tx = (Tx) ((TxEvent)evt).getTransaction();
+			Arrays.asList(values).stream().filter(e -> e.getKind() == EventKind.BEGIN).forEach(evt -> {
+				Tx tx = (Tx) ((TxEvent) evt).getTransaction();
 				int rowIdx = 0;
-				for(; rowIdx<rowendtime.size() && rowendtime.get(rowIdx)>tx.getBeginTime(); rowIdx++);
-				if(rowendtime.size()<=rowIdx)
+				for (; rowIdx < rowendtime.size() && rowendtime.get(rowIdx) > tx.getBeginTime(); rowIdx++)
+					;
+				if (rowendtime.size() <= rowIdx)
 					rowendtime.add(tx.getEndTime());
 				else
 					rowendtime.set(rowIdx, tx.getEndTime());
 				tx.setConcurrencyIndex(rowIdx);
 			});
 		});
-		concurrencyCalculated=true;
+		concurrencyCalculated = true;
 	}
 
 }
diff --git a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/ScvRelation.java b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/ScvRelation.java
index de07918..3c31980 100644
--- a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/ScvRelation.java
+++ b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/ScvRelation.java
@@ -1,21 +1,43 @@
+/*******************************************************************************
+ * Copyright (c) 2020 MINRES Technologies GmbH and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     MINRES Technologies GmbH - initial API and implementation
+ *******************************************************************************/
 package com.minres.scviewer.database.text;
 
 import java.io.Serializable;
 
 import com.minres.scviewer.database.RelationType;
 
+/**
+ * The Class ScvRelation.
+ */
 class ScvRelation implements Serializable {
-	/**
-	 * 
-	 */
+
+	/** The Constant serialVersionUID. */
 	private static final long serialVersionUID = -347668857680574140L;
 
+	/** The source. */
 	final long source;
-	
+
+	/** The target. */
 	final long target;
-	
+
+	/** The relation type. */
 	final RelationType relationType;
-	
+
+	/**
+	 * Instantiates a new scv relation.
+	 *
+	 * @param relationType the relation type
+	 * @param source       the source
+	 * @param target       the target
+	 */
 	public ScvRelation(RelationType relationType, long source, long target) {
 		this.source = source;
 		this.target = target;
diff --git a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/ScvTx.java b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/ScvTx.java
index 92498f2..f94d609 100644
--- a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/ScvTx.java
+++ b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/ScvTx.java
@@ -1,5 +1,6 @@
 /*******************************************************************************
  * Copyright (c) 2012 IT Just working.
+ * Copyright (c) 2020 MINRES Technologies GmbH
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -16,32 +17,54 @@ import java.util.List;
 
 import com.minres.scviewer.database.tx.ITxAttribute;
 
-class ScvTx implements Serializable{
-	
-	/**
-	 * 
-	 */
+/**
+ * The Class ScvTx.
+ */
+class ScvTx implements Serializable {
+
+	/** The Constant serialVersionUID. */
 	private static final long serialVersionUID = -855200240003328221L;
 
+	/** The id. */
 	final long id;
-	
+
+	/** The generator id. */
 	final long generatorId;
 
+	/** The stream id. */
 	final long streamId;
-	
+
+	/** The begin time. */
 	long beginTime;
-	
+
+	/** The end time. */
 	long endTime;
-	
+
+	/** The attributes. */
 	final List<ITxAttribute> attributes = new ArrayList<>();
-	
-	ScvTx(long id, long streamId, long generatorId, long begin){
-		this.id=id;
-		this.streamId=streamId;
-		this.generatorId=generatorId;
-		this.beginTime=begin;
-        this.endTime=begin;
+
+	/**
+	 * Instantiates a new scv tx.
+	 *
+	 * @param id          the id
+	 * @param streamId    the stream id
+	 * @param generatorId the generator id
+	 * @param begin       the begin
+	 */
+	ScvTx(long id, long streamId, long generatorId, long begin) {
+		this.id = id;
+		this.streamId = streamId;
+		this.generatorId = generatorId;
+		this.beginTime = begin;
+		this.endTime = begin;
+	}
+
+	/**
+	 * Gets the id.
+	 *
+	 * @return the id
+	 */
+	Long getId() {
+		return id;
 	}
-	
-	Long getId() {return id;}
 }
diff --git a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TextDbLoader.java b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TextDbLoader.java
index 0b6d9c0..df575bc 100644
--- a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TextDbLoader.java
+++ b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TextDbLoader.java
@@ -1,5 +1,6 @@
 /*******************************************************************************
  * Copyright (c) 2012 IT Just working.
+ * Copyright (c) 2020 MINRES Technologies GmbH
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -47,101 +48,128 @@ import com.minres.scviewer.database.RelationType;
 import com.minres.scviewer.database.RelationTypeFactory;
 import com.minres.scviewer.database.tx.ITx;
 
-public class TextDbLoader implements IWaveformDbLoader{
+/**
+ * The Class TextDbLoader.
+ */
+public class TextDbLoader implements IWaveformDbLoader {
 
-	private Long maxTime=0L;
+	/** The max time. */
+	private Long maxTime = 0L;
 
-	DB mapDb=null;
-	
-    final List<String> attrValues = new ArrayList<>();
+	/** The map db. */
+	DB mapDb = null;
 
+	/** The attr values. */
+	final List<String> attrValues = new ArrayList<>();
+
+	/** The relation types. */
 	final Map<String, RelationType> relationTypes = UnifiedMap.newMap();
-    
-    final Map<Long, TxStream> txStreams = UnifiedMap.newMap();
-    
-    final Map<Long, TxGenerator> txGenerators = UnifiedMap.newMap();
-    
-    Map<Long, ScvTx> transactions = null;
 
-    final Map<String, TxAttributeType> attributeTypes = UnifiedMap.newMap();
+	/** The tx streams. */
+	final Map<Long, TxStream> txStreams = UnifiedMap.newMap();
 
+	/** The tx generators. */
+	final Map<Long, TxGenerator> txGenerators = UnifiedMap.newMap();
+
+	/** The transactions. */
+	Map<Long, ScvTx> transactions = null;
+
+	/** The attribute types. */
+	final Map<String, TxAttributeType> attributeTypes = UnifiedMap.newMap();
+
+	/** The relations in. */
 	final HashMultimap<Long, ScvRelation> relationsIn = HashMultimap.create();
 
+	/** The relations out. */
 	final HashMultimap<Long, ScvRelation> relationsOut = HashMultimap.create();
 
-    HashMap<Long, Tx> txCache = new HashMap<>();
+	/** The tx cache. */
+	HashMap<Long, Tx> txCache = new HashMap<>();
 
-    List<Thread> threads = new ArrayList<>();
-    
-    @Override
+	/** The threads. */
+	List<Thread> threads = new ArrayList<>();
+
+	/**
+	 * Gets the max time.
+	 *
+	 * @return the max time
+	 */
+	@Override
 	public Long getMaxTime() {
 		return maxTime;
 	}
 
+	/**
+	 * Gets the all waves.
+	 *
+	 * @return the all waves
+	 */
 	@Override
 	public Collection<IWaveform> getAllWaves() {
 		return new ArrayList<>(txStreams.values());
 	}
 
+	/** The Constant x. */
 	static final byte[] x = "scv_tr_stream".getBytes();
 
+	/**
+	 * Load.
+	 *
+	 * @param db   the db
+	 * @param file the file
+	 * @return true, if successful
+	 * @throws InputFormatException the input format exception
+	 */
 	@SuppressWarnings("unchecked")
 	@Override
-	public	boolean load(IWaveformDb db, File file) throws InputFormatException {
+	public boolean load(IWaveformDb db, File file) throws InputFormatException {
 		dispose();
-		if(file.isDirectory() || !file.exists()) return false;
+		if (file.isDirectory() || !file.exists())
+			return false;
 		TextDbParser parser = new TextDbParser(this);
 		boolean gzipped = isGzipped(file);
 		try {
-		if(!isTxfile(gzipped?new GZIPInputStream(new FileInputStream(file)):new FileInputStream(file)))
-			return false;
-		} catch(Exception e) {
+			if (!isTxfile(gzipped ? new GZIPInputStream(new FileInputStream(file)) : new FileInputStream(file)))
+				return false;
+		} catch (Exception e) {
 			throw new InputFormatException();
 		}
-		
-		if(file.length() < 75000000*(gzipped?1:10) || "memory".equals(System.getProperty("ScvBackingDB", "file")))
-			mapDb = DBMaker
-			.memoryDirectDB()
-			.allocateStartSize(512l*1024l*1024l)
-			.allocateIncrement(128l*1024l*1024l)
-			.cleanerHackEnable()
-			.make();
+
+		if (file.length() < 75000000 * (gzipped ? 1 : 10)
+				|| "memory".equals(System.getProperty("ScvBackingDB", "file")))
+			mapDb = DBMaker.memoryDirectDB().allocateStartSize(512l * 1024l * 1024l)
+					.allocateIncrement(128l * 1024l * 1024l).cleanerHackEnable().make();
 		else {
 			File mapDbFile;
 			try {
-				mapDbFile = File.createTempFile("."+file.getName(), ".mapdb", null /*file.parentFile*/);
+				mapDbFile = File.createTempFile("." + file.getName(), ".mapdb", null /* file.parentFile */);
 				Files.delete(Paths.get(mapDbFile.getPath()));
 			} catch (IOException e1) {
 				return false;
 			}
-			mapDb = DBMaker
-			.fileDB(mapDbFile)
-			.fileMmapEnable()            // Always enable mmap
-			.fileMmapEnableIfSupported()
-			.fileMmapPreclearDisable()
-			.allocateStartSize(512l*1024l*1024l)
-			.allocateIncrement(128l*1024l*1024l)
-			.cleanerHackEnable()
-			.make();
+			mapDb = DBMaker.fileDB(mapDbFile).fileMmapEnable() // Always enable mmap
+					.fileMmapEnableIfSupported().fileMmapPreclearDisable().allocateStartSize(512l * 1024l * 1024l)
+					.allocateIncrement(128l * 1024l * 1024l).cleanerHackEnable().make();
 			mapDbFile.deleteOnExit();
 		}
 		try {
-			parser.txSink = mapDb.treeMap("transactions", Serializer.LONG,Serializer.JAVA).createFromSink();
-			parser.parseInput(gzipped?new GZIPInputStream(new FileInputStream(file)):new FileInputStream(file));
+			parser.txSink = mapDb.treeMap("transactions", Serializer.LONG, Serializer.JAVA).createFromSink();
+			parser.parseInput(gzipped ? new GZIPInputStream(new FileInputStream(file)) : new FileInputStream(file));
 			transactions = parser.txSink.create();
-		} catch(IllegalArgumentException|ArrayIndexOutOfBoundsException e) {
-		} catch(Exception e) {
-			System.out.println("---->>> Exception "+e.toString()+" caught while loading database");
+		} catch (IllegalArgumentException | ArrayIndexOutOfBoundsException e) {
+		} catch (Exception e) {
+			System.out.println("---->>> Exception " + e.toString() + " caught while loading database");
 			e.printStackTrace();
 			return false;
 		}
-		for(TxStream stream:txStreams.values()) {
+		for (TxStream stream : txStreams.values()) {
 			Thread t = new Thread() {
 				@Override
 				public void run() {
 					try {
-					stream.calculateConcurrency();
-					} catch (Exception e) {/* don't let exceptions bubble up */ }
+						stream.calculateConcurrency();
+					} catch (Exception e) {
+						/* don't let exceptions bubble up */ }
 				}
 			};
 			threads.add(t);
@@ -149,31 +177,41 @@ public class TextDbLoader implements IWaveformDbLoader{
 		}
 		return true;
 	}
-	
+
+	/**
+	 * Dispose.
+	 */
 	@Override
 	public void dispose() {
 		attrValues.clear();
 		relationTypes.clear();
-	    txStreams.clear();
-	    txGenerators.clear();
-	    transactions = null;
-	    attributeTypes.clear(); 
+		txStreams.clear();
+		txGenerators.clear();
+		transactions = null;
+		attributeTypes.clear();
 		relationsIn.clear();
 		relationsOut.clear();
-		if(mapDb!=null) {
+		if (mapDb != null) {
 			mapDb.close();
-			mapDb=null;
+			mapDb = null;
 		}
 	}
-	
+
+	/**
+	 * Checks if is txfile.
+	 *
+	 * @param istream the istream
+	 * @return true, if is txfile
+	 */
 	private static boolean isTxfile(InputStream istream) {
 		byte[] buffer = new byte[x.length];
 		try {
 			int readCnt = istream.read(buffer, 0, x.length);
 			istream.close();
-			if(readCnt==x.length){
-				for(int i=0; i<x.length; i++)
-					if(buffer[i]!=x[i]) return false;
+			if (readCnt == x.length) {
+				for (int i = 0; i < x.length; i++)
+					if (buffer[i] != x[i])
+						return false;
 			}
 			return true;
 		} catch (IOException e) {
@@ -181,178 +219,254 @@ public class TextDbLoader implements IWaveformDbLoader{
 		}
 	}
 
+	/**
+	 * Checks if is gzipped.
+	 *
+	 * @param f the f
+	 * @return true, if is gzipped
+	 */
 	private static boolean isGzipped(File f) {
-		try(InputStream is = new FileInputStream(f)) {
-			byte [] signature = new byte[2];
-			int nread = is.read( signature ); //read the gzip signature
-			return nread == 2 && signature[ 0 ] == (byte) 0x1f && signature[ 1 ] == (byte) 0x8b;
+		try (InputStream is = new FileInputStream(f)) {
+			byte[] signature = new byte[2];
+			int nread = is.read(signature); // read the gzip signature
+			return nread == 2 && signature[0] == (byte) 0x1f && signature[1] == (byte) 0x8b;
 		} catch (IOException e) {
 			return false;
 		}
 	}
 
-	public Collection<RelationType> getAllRelationTypes(){
+	/**
+	 * Gets the all relation types.
+	 *
+	 * @return the all relation types
+	 */
+	public Collection<RelationType> getAllRelationTypes() {
 		return relationTypes.values();
 	}
 
+	/**
+	 * The Class TextDbParser.
+	 */
 	static class TextDbParser {
-		static final Pattern scv_tr_stream = Pattern.compile("^scv_tr_stream\\s+\\(ID (\\d+),\\s+name\\s+\"([^\"]+)\",\\s+kind\\s+\"([^\"]+)\"\\)$");
-		static final Pattern scv_tr_generator = Pattern.compile("^scv_tr_generator\\s+\\(ID\\s+(\\d+),\\s+name\\s+\"([^\"]+)\",\\s+scv_tr_stream\\s+(\\d+),$");
-		static final Pattern begin_attribute = Pattern.compile("^begin_attribute \\(ID (\\d+), name \"([^\"]+)\", type \"([^\"]+)\"\\)$");
-		static final Pattern end_attribute = Pattern.compile("^end_attribute \\(ID (\\d+), name \"([^\"]+)\", type \"([^\"]+)\"\\)$");
-				
+
+		/** The Constant scv_tr_stream. */
+		static final Pattern scv_tr_stream = Pattern
+				.compile("^scv_tr_stream\\s+\\(ID (\\d+),\\s+name\\s+\"([^\"]+)\",\\s+kind\\s+\"([^\"]+)\"\\)$");
+
+		/** The Constant scv_tr_generator. */
+		static final Pattern scv_tr_generator = Pattern
+				.compile("^scv_tr_generator\\s+\\(ID\\s+(\\d+),\\s+name\\s+\"([^\"]+)\",\\s+scv_tr_stream\\s+(\\d+),$");
+
+		/** The Constant begin_attribute. */
+		static final Pattern begin_attribute = Pattern
+				.compile("^begin_attribute \\(ID (\\d+), name \"([^\"]+)\", type \"([^\"]+)\"\\)$");
+
+		/** The Constant end_attribute. */
+		static final Pattern end_attribute = Pattern
+				.compile("^end_attribute \\(ID (\\d+), name \"([^\"]+)\", type \"([^\"]+)\"\\)$");
+
+		/** The loader. */
 		final TextDbLoader loader;
-		
+
+		/** The transaction by id. */
 		HashMap<Long, ScvTx> transactionById = new HashMap<>();
-		
+
+		/** The tx sink. */
 		TreeMapSink<Long, ScvTx> txSink;
-		
+
+		/** The reader. */
 		BufferedReader reader = null;
-		
-		TxGenerator generator=null;
-		
+
+		/** The generator. */
+		TxGenerator generator = null;
+
+		/** The attr value lut. */
 		Map<String, Integer> attrValueLut = new HashMap<>();
-		
+
+		/**
+		 * Instantiates a new text db parser.
+		 *
+		 * @param loader the loader
+		 */
 		public TextDbParser(TextDbLoader loader) {
 			super();
 			this.loader = loader;
 		}
 
-		void parseInput(InputStream inputStream) throws IOException{
+		/**
+		 * Parses the input.
+		 *
+		 * @param inputStream the input stream
+		 * @throws IOException Signals that an I/O exception has occurred.
+		 */
+		void parseInput(InputStream inputStream) throws IOException {
 			reader = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8));
 			String curLine = reader.readLine();
 			String nextLine = null;
-			while((nextLine=reader.readLine())!=null && curLine!=null) {
-				curLine=parseLine(curLine, nextLine);
+			while ((nextLine = reader.readLine()) != null && curLine != null) {
+				curLine = parseLine(curLine, nextLine);
 			}
-			if(curLine!=null)
+			if (curLine != null)
 				parseLine(curLine, nextLine);
 		}
 
-		private TxAttributeType getAttrType(String name, DataType dataType, AssociationType type){
-			String key =name+"-"+dataType.toString();
+		/**
+		 * Gets the attr type.
+		 *
+		 * @param name     the name
+		 * @param dataType the data type
+		 * @param type     the type
+		 * @return the attr type
+		 */
+		private TxAttributeType getAttrType(String name, DataType dataType, AssociationType type) {
+			String key = name + "-" + dataType.toString();
 			TxAttributeType res;
-			if(loader.attributeTypes.containsKey(key)){
-				res=loader.attributeTypes.get(key);
+			if (loader.attributeTypes.containsKey(key)) {
+				res = loader.attributeTypes.get(key);
 			} else {
-				res=new TxAttributeType(name, dataType, type);
+				res = new TxAttributeType(name, dataType, type);
 				loader.attributeTypes.put(key, res);
 			}
 			return res;
 		}
 
-		private String parseLine(String curLine, String nextLine) throws IOException{
+		/**
+		 * Parses the line.
+		 *
+		 * @param curLine  the cur line
+		 * @param nextLine the next line
+		 * @return the string
+		 * @throws IOException Signals that an I/O exception has occurred.
+		 */
+		private String parseLine(String curLine, String nextLine) throws IOException {
 			String[] tokens = curLine.split("\\s+");
-			if("tx_record_attribute".equals(tokens[0])){
+			if ("tx_record_attribute".equals(tokens[0])) {
 				Long id = Long.parseLong(tokens[1]);
 				String name = tokens[2].substring(1, tokens[2].length());
 				DataType type = DataType.valueOf(tokens[3]);
-				String remaining = tokens.length>5?String.join(" ", Arrays.copyOfRange(tokens, 5, tokens.length)):"";
+				String remaining = tokens.length > 5 ? String.join(" ", Arrays.copyOfRange(tokens, 5, tokens.length))
+						: "";
 				TxAttributeType attrType = getAttrType(name, type, AssociationType.RECORD);
 				transactionById.get(id).attributes.add(new TxAttribute(attrType, getAttrString(attrType, remaining)));
-			} else if("tx_begin".equals(tokens[0])){
+			} else if ("tx_begin".equals(tokens[0])) {
 				Long id = Long.parseLong(tokens[1]);
 				Long genId = Long.parseLong(tokens[2]);
-				TxGenerator gen=loader.txGenerators.get(genId);
-				ScvTx scvTx = new ScvTx(id, gen.stream.getId(), genId, Long.parseLong(tokens[3])*stringToScale(tokens[4]));
-				loader.maxTime = loader.maxTime>scvTx.beginTime?loader.maxTime:scvTx.beginTime;
+				TxGenerator gen = loader.txGenerators.get(genId);
+				ScvTx scvTx = new ScvTx(id, gen.stream.getId(), genId,
+						Long.parseLong(tokens[3]) * stringToScale(tokens[4]));
+				loader.maxTime = loader.maxTime > scvTx.beginTime ? loader.maxTime : scvTx.beginTime;
 				TxStream stream = loader.txStreams.get(gen.stream.getId());
-				stream.setConcurrency(stream.getConcurrency()+1);
-				if(nextLine!=null && nextLine.charAt(0)=='a') {
-					int idx=0;
-					while(nextLine!=null && nextLine.charAt(0)=='a') {
-						String[] attrTokens=nextLine.split("\\s+");
+				stream.setConcurrency(stream.getConcurrency() + 1);
+				if (nextLine != null && nextLine.charAt(0) == 'a') {
+					int idx = 0;
+					while (nextLine != null && nextLine.charAt(0) == 'a') {
+						String[] attrTokens = nextLine.split("\\s+");
 						TxAttributeType attrType = gen.beginAttrs.get(idx);
 						TxAttribute attr = new TxAttribute(attrType, getAttrString(attrType, attrTokens[1]));
 						scvTx.attributes.add(attr);
 						idx++;
-						nextLine=reader.readLine();
+						nextLine = reader.readLine();
 					}
 				}
 				txSink.put(id, scvTx);
 				transactionById.put(id, scvTx);
-			} else if("tx_end".equals(tokens[0])){
+			} else if ("tx_end".equals(tokens[0])) {
 				Long id = Long.parseLong(tokens[1]);
 				ScvTx scvTx = transactionById.get(id);
-				assert Long.parseLong(tokens[2])==scvTx.generatorId;
-				scvTx.endTime=Long.parseLong(tokens[3])*stringToScale(tokens[4]);
-				loader.maxTime = loader.maxTime>scvTx.endTime?loader.maxTime:scvTx.endTime;
+				assert Long.parseLong(tokens[2]) == scvTx.generatorId;
+				scvTx.endTime = Long.parseLong(tokens[3]) * stringToScale(tokens[4]);
+				loader.maxTime = loader.maxTime > scvTx.endTime ? loader.maxTime : scvTx.endTime;
 				TxGenerator gen = loader.txGenerators.get(scvTx.generatorId);
 				TxStream stream = loader.txStreams.get(gen.stream.getId());
-				if(scvTx.beginTime==scvTx.endTime)
-					stream.addEvent(new TxEvent(loader, EventKind.SINGLE, id, scvTx.beginTime));
-				else {
-					stream.addEvent(new TxEvent(loader, EventKind.BEGIN, id, scvTx.beginTime));
-					stream.addEvent(new TxEvent(loader, EventKind.END, id, scvTx.endTime));
+				if (scvTx.beginTime == scvTx.endTime) {
+					TxEvent evt = new TxEvent(loader, EventKind.SINGLE, id, scvTx.beginTime);
+					stream.addEvent(evt);
+					gen.addEvent(evt);
+				} else {
+					TxEvent begEvt = new TxEvent(loader, EventKind.BEGIN, id, scvTx.beginTime);
+					stream.addEvent(begEvt);
+					gen.addEvent(begEvt);
+					TxEvent endEvt = new TxEvent(loader, EventKind.END, id, scvTx.endTime);
+					stream.addEvent(endEvt);
+					gen.addEvent(endEvt);
 				}
-				stream.setConcurrency(stream.getConcurrency()-1);
-				if(nextLine!=null && nextLine.charAt(0)=='a') {
-					int idx=0;
-					while(nextLine!=null && nextLine.charAt(0)=='a') {
-						String[] attrTokens=nextLine.split("\\s+");
+				stream.setConcurrency(stream.getConcurrency() - 1);
+				if (nextLine != null && nextLine.charAt(0) == 'a') {
+					int idx = 0;
+					while (nextLine != null && nextLine.charAt(0) == 'a') {
+						String[] attrTokens = nextLine.split("\\s+");
 						TxAttributeType attrType = gen.endAttrs.get(idx);
 						TxAttribute attr = new TxAttribute(attrType, getAttrString(attrType, attrTokens[1]));
 						scvTx.attributes.add(attr);
 						idx++;
-						nextLine=reader.readLine();
+						nextLine = reader.readLine();
 					}
 				}
-			} else if("tx_relation".equals(tokens[0])){
-				Long tr2= Long.parseLong(tokens[2]);
-				Long tr1= Long.parseLong(tokens[3]);
-				String relType=tokens[1].substring(1, tokens[1].length()-1);
-				if(!loader.relationTypes.containsKey(relType))
+			} else if ("tx_relation".equals(tokens[0])) {
+				Long tr2 = Long.parseLong(tokens[2]);
+				Long tr1 = Long.parseLong(tokens[3]);
+				String relType = tokens[1].substring(1, tokens[1].length() - 1);
+				if (!loader.relationTypes.containsKey(relType))
 					loader.relationTypes.put(relType, RelationTypeFactory.create(relType));
 				ScvRelation rel = new ScvRelation(loader.relationTypes.get(relType), tr1, tr2);
 				loader.relationsOut.put(tr1, rel);
 				loader.relationsIn.put(tr2, rel);
-			} else if("scv_tr_stream".equals(tokens[0])){
+			} else if ("scv_tr_stream".equals(tokens[0])) {
 				Matcher matcher = scv_tr_stream.matcher(curLine);
 				if (matcher.matches()) {
 					Long id = Long.parseLong(matcher.group(1));
 					TxStream stream = new TxStream(loader, id, matcher.group(2), matcher.group(3));
 					loader.txStreams.put(id, stream);
 				}
-			} else if("scv_tr_generator".equals(tokens[0])){
+			} else if ("scv_tr_generator".equals(tokens[0])) {
 				Matcher matcher = scv_tr_generator.matcher(curLine);
 				if ((matcher.matches())) {
 					Long id = Long.parseLong(matcher.group(1));
-					TxStream stream=loader.txStreams.get(Long.parseLong(matcher.group(3)));
-					generator=new TxGenerator(loader, id, matcher.group(2), stream);
-					loader.txGenerators.put(id,  generator);
+					TxStream stream = loader.txStreams.get(Long.parseLong(matcher.group(3)));
+					generator = new TxGenerator(loader, id, matcher.group(2), stream);
+					loader.txGenerators.put(id, generator);
 				}
-			} else if("begin_attribute".equals(tokens[0])){
+			} else if ("begin_attribute".equals(tokens[0])) {
 				Matcher matcher = begin_attribute.matcher(curLine);
 				if ((matcher.matches())) {
-					TxAttributeType attrType = getAttrType(matcher.group(2), DataType.valueOf(matcher.group(3)), AssociationType.BEGIN);
+					TxAttributeType attrType = getAttrType(matcher.group(2), DataType.valueOf(matcher.group(3)),
+							AssociationType.BEGIN);
 					generator.beginAttrs.add(attrType);
 				}
-			} else if("end_attribute".equals(tokens[0])){
+			} else if ("end_attribute".equals(tokens[0])) {
 				Matcher matcher = end_attribute.matcher(curLine);
 				if ((matcher.matches())) {
-					TxAttributeType attrType = getAttrType(matcher.group(2), DataType.valueOf(matcher.group(3)), AssociationType.END);
+					TxAttributeType attrType = getAttrType(matcher.group(2), DataType.valueOf(matcher.group(3)),
+							AssociationType.END);
 					generator.endAttrs.add(attrType);
 				}
-			} else if(")".equals(tokens[0])){
-				generator=null;
-			} else if("a".equals(tokens[0])){//matcher = line =~ /^a\s+(.+)$/
-				System.out.println("Don't know what to do with: '"+curLine+"'");
+			} else if (")".equals(tokens[0])) {
+				generator = null;
+			} else if ("a".equals(tokens[0])) {// matcher = line =~ /^a\s+(.+)$/
+				System.out.println("Don't know what to do with: '" + curLine + "'");
 			} else
-				System.out.println("Don't know what to do with: '"+curLine+"'");
+				System.out.println("Don't know what to do with: '" + curLine + "'");
 			return nextLine;
 		}
-		
+
+		/**
+		 * Gets the attr string.
+		 *
+		 * @param attrType the attr type
+		 * @param string   the string
+		 * @return the attr string
+		 */
 		private String getAttrString(TxAttributeType attrType, String string) {
 			String value;
-			switch(attrType.getDataType()){
+			switch (attrType.getDataType()) {
 			case STRING:
 			case ENUMERATION:
-				value=string.substring(1, string.length()-1);
+				value = string.substring(1, string.length() - 1);
 				break;
 			default:
-				value=string;
+				value = string;
 			}
-			if(attrValueLut.containsKey(value)){
+			if (attrValueLut.containsKey(value)) {
 				return loader.attrValues.get(attrValueLut.get(value));
 			} else {
 				attrValueLut.put(value, loader.attrValues.size());
@@ -361,20 +475,38 @@ public class TextDbLoader implements IWaveformDbLoader{
 			}
 		}
 
-		private long stringToScale(String scale){
+		/**
+		 * String to scale.
+		 *
+		 * @param scale the scale
+		 * @return the long
+		 */
+		private long stringToScale(String scale) {
 			String cmp = scale.trim();
-			if("fs".equals(cmp)) return 1L;
-			if("ps".equals(cmp)) return 1000L;
-			if("ns".equals(cmp)) return 1000000L;
-			if("us".equals(cmp)) return 1000000000L;
-			if("ms".equals(cmp)) return 1000000000000L;
-			if("s".equals(cmp) ) return 1000000000000000L;
+			if ("fs".equals(cmp))
+				return 1L;
+			if ("ps".equals(cmp))
+				return 1000L;
+			if ("ns".equals(cmp))
+				return 1000000L;
+			if ("us".equals(cmp))
+				return 1000000000L;
+			if ("ms".equals(cmp))
+				return 1000000000000L;
+			if ("s".equals(cmp))
+				return 1000000000000000L;
 			return 1L;
 		}
 	}
 
+	/**
+	 * Gets the transaction.
+	 *
+	 * @param txId the tx id
+	 * @return the transaction
+	 */
 	public ITx getTransaction(long txId) {
-		if(txCache.containsKey(txId))
+		if (txCache.containsKey(txId))
 			return txCache.get(txId);
 		Tx tx = new Tx(this, txId);
 		txCache.put(txId, tx);
@@ -382,4 +514,3 @@ public class TextDbLoader implements IWaveformDbLoader{
 	}
 
 }
-
diff --git a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/Tx.java b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/Tx.java
index cf24abc..3f288b1 100644
--- a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/Tx.java
+++ b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/Tx.java
@@ -1,5 +1,6 @@
 /*******************************************************************************
  * Copyright (c) 2012 IT Just working.
+ * Copyright (c) 2020 MINRES Technologies GmbH
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -21,111 +22,217 @@ import com.minres.scviewer.database.tx.ITxAttribute;
 import com.minres.scviewer.database.tx.ITxGenerator;
 import com.minres.scviewer.database.tx.ITxRelation;
 
+/**
+ * The Class Tx.
+ */
 class Tx implements ITx {
-	
+
+	/** The loader. */
 	private final TextDbLoader loader;
-	
+
+	/** The id. */
 	private long id;
-		
-	long beginTime=-1;
-	
-	long endTime=-1;
-	
+
+	/** The begin time. */
+	long beginTime = -1;
+
+	/** The end time. */
+	long endTime = -1;
+
+	/** The concurrency index. */
 	private int concurrencyIndex;
-				
+
+	/**
+	 * Instantiates a new tx.
+	 *
+	 * @param loader the loader
+	 * @param scvTx  the scv tx
+	 */
 	public Tx(TextDbLoader loader, ScvTx scvTx) {
-		this.loader=loader;
-		id=scvTx.id;
+		this.loader = loader;
+		id = scvTx.id;
 	}
 
+	/**
+	 * Instantiates a new tx.
+	 *
+	 * @param loader the loader
+	 * @param txId   the tx id
+	 */
 	public Tx(TextDbLoader loader, long txId) {
-		this.loader=loader;
-		id=txId;
+		this.loader = loader;
+		id = txId;
 	}
 
+	/**
+	 * Gets the incoming relations.
+	 *
+	 * @return the incoming relations
+	 */
 	@Override
 	public Collection<ITxRelation> getIncomingRelations() {
 		Set<ScvRelation> rels = loader.relationsIn.get(id);
 		return rels.stream().map(rel -> new TxRelation(loader, rel)).collect(Collectors.toList());
 	}
 
+	/**
+	 * Gets the outgoing relations.
+	 *
+	 * @return the outgoing relations
+	 */
 	@Override
 	public Collection<ITxRelation> getOutgoingRelations() {
 		Set<ScvRelation> rels = loader.relationsOut.get(id);
 		return rels.stream().map(rel -> new TxRelation(loader, rel)).collect(Collectors.toList());
 	}
 
+	/**
+	 * Compare to.
+	 *
+	 * @param o the o
+	 * @return the int
+	 */
 	@Override
 	public int compareTo(ITx o) {
-		int res =getBeginTime().compareTo(o.getBeginTime());
-		if(res!=0) 
+		int res = getBeginTime().compareTo(o.getBeginTime());
+		if (res != 0)
 			return res;
 		else
 			return getId().compareTo(o.getId());
 	}
-	
-	@Override
-    public boolean equals(Object obj) {
-        if (this == obj) return true;
-        if (obj == null || getClass() != obj.getClass()) return false;
-        return this.getScvTx().equals(((Tx) obj).getScvTx());
-    }
 
+	/**
+	 * Equals.
+	 *
+	 * @param obj the obj
+	 * @return true, if successful
+	 */
 	@Override
-    public int hashCode() {
+	public boolean equals(Object obj) {
+		if (this == obj)
+			return true;
+		if (obj == null || getClass() != obj.getClass())
+			return false;
+		return this.getScvTx().equals(((Tx) obj).getScvTx());
+	}
+
+	/**
+	 * Hash code.
+	 *
+	 * @return the int
+	 */
+	@Override
+	public int hashCode() {
 		return getScvTx().hashCode();
 	}
 
+	/**
+	 * To string.
+	 *
+	 * @return the string
+	 */
 	@Override
 	public String toString() {
-		return "tx#"+getId()+"["+getBeginTime()/1000000+"ns - "+getEndTime()/1000000+"ns]";
+		return "tx#" + getId() + "[" + getBeginTime() / 1000000 + "ns - " + getEndTime() / 1000000 + "ns]";
 	}
 
+	/**
+	 * Gets the id.
+	 *
+	 * @return the id
+	 */
 	@Override
 	public Long getId() {
 		return getScvTx().id;
 	}
 
+	/**
+	 * Gets the stream.
+	 *
+	 * @return the stream
+	 */
 	@Override
 	public IWaveform getStream() {
 		return loader.txStreams.get(getScvTx().streamId);
 	}
 
+	/**
+	 * Gets the generator.
+	 *
+	 * @return the generator
+	 */
 	@Override
 	public ITxGenerator getGenerator() {
 		return loader.txGenerators.get(getScvTx().generatorId);
 	}
 
+	/**
+	 * Gets the begin time.
+	 *
+	 * @return the begin time
+	 */
 	@Override
 	public Long getBeginTime() {
-		if(beginTime<0)	beginTime=getScvTx().beginTime;
+		if (beginTime < 0)
+			beginTime = getScvTx().beginTime;
 		return beginTime;
 	}
 
+	/**
+	 * Gets the end time.
+	 *
+	 * @return the end time
+	 */
 	@Override
 	public Long getEndTime() {
-		if(endTime<0) endTime=getScvTx().endTime;
+		if (endTime < 0)
+			endTime = getScvTx().endTime;
 		return endTime;
 	}
 
+	/**
+	 * Sets the end time.
+	 *
+	 * @param time the new end time
+	 */
 	void setEndTime(Long time) {
-		 getScvTx().endTime=time;
+		getScvTx().endTime = time;
 	}
 
+	/**
+	 * Gets the concurrency index.
+	 *
+	 * @return the concurrency index
+	 */
 	@Override
 	public int getConcurrencyIndex() {
 		return concurrencyIndex;
 	}
 
+	/**
+	 * Sets the concurrency index.
+	 *
+	 * @param idx the new concurrency index
+	 */
 	void setConcurrencyIndex(int idx) {
-		concurrencyIndex=idx;
+		concurrencyIndex = idx;
 	}
 
+	/**
+	 * Gets the attributes.
+	 *
+	 * @return the attributes
+	 */
 	@Override
 	public List<ITxAttribute> getAttributes() {
 		return getScvTx().attributes;
 	}
 
+	/**
+	 * Gets the scv tx.
+	 *
+	 * @return the scv tx
+	 */
 	private ScvTx getScvTx() {
 		return loader.transactions.get(id);
 	}
diff --git a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxAttribute.java b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxAttribute.java
index 26e316c..3f8976e 100644
--- a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxAttribute.java
+++ b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxAttribute.java
@@ -1,5 +1,6 @@
 /*******************************************************************************
  * Copyright (c) 2012 IT Just working.
+ * Copyright (c) 2020 MINRES Technologies GmbH
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -16,37 +17,66 @@ import com.minres.scviewer.database.AssociationType;
 import com.minres.scviewer.database.DataType;
 import com.minres.scviewer.database.tx.ITxAttribute;
 
-public class TxAttribute  implements ITxAttribute, Serializable {
-	
-	/**
-	 * 
-	 */
+/**
+ * The Class TxAttribute.
+ */
+public class TxAttribute implements ITxAttribute, Serializable {
+
+	/** The Constant serialVersionUID. */
 	private static final long serialVersionUID = 4767726016651807152L;
 
+	/** The attribute type. */
 	private final TxAttributeType attributeType;
 
+	/** The value. */
 	private final String value;
-	
-	TxAttribute(TxAttributeType type, String value){
-		this.attributeType=type;
-		this.value=value;
+
+	/**
+	 * Instantiates a new tx attribute.
+	 *
+	 * @param type  the type
+	 * @param value the value
+	 */
+	TxAttribute(TxAttributeType type, String value) {
+		this.attributeType = type;
+		this.value = value;
 	}
 
+	/**
+	 * Gets the name.
+	 *
+	 * @return the name
+	 */
 	@Override
 	public String getName() {
 		return attributeType.getName();
 	}
 
+	/**
+	 * Gets the type.
+	 *
+	 * @return the type
+	 */
 	@Override
 	public AssociationType getType() {
 		return attributeType.getType();
 	}
 
+	/**
+	 * Gets the data type.
+	 *
+	 * @return the data type
+	 */
 	@Override
 	public DataType getDataType() {
 		return attributeType.getDataType();
 	}
 
+	/**
+	 * Gets the value.
+	 *
+	 * @return the value
+	 */
 	@Override
 	public Object getValue() {
 		return value;
diff --git a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxAttributeType.java b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxAttributeType.java
index 67c72aa..90e1b27 100644
--- a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxAttributeType.java
+++ b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxAttributeType.java
@@ -1,5 +1,6 @@
 /*******************************************************************************
  * Copyright (c) 2012 IT Just working.
+ * Copyright (c) 2020 MINRES Technologies GmbH
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -16,34 +17,61 @@ import com.minres.scviewer.database.AssociationType;
 import com.minres.scviewer.database.DataType;
 import com.minres.scviewer.database.tx.ITxAttributeType;
 
+/**
+ * The Class TxAttributeType.
+ */
 class TxAttributeType implements ITxAttributeType, Serializable {
-	/**
-	 * 
-	 */
+
+	/** The Constant serialVersionUID. */
 	private static final long serialVersionUID = 7159721937208946828L;
-	
+
+	/** The name. */
 	private String name;
-	
+
+	/** The data type. */
 	private DataType dataType;
-	
+
+	/** The type. */
 	private AssociationType type;
-	
-	TxAttributeType(String name, DataType dataType, AssociationType type){
-		this.name=name;
-		this.dataType=dataType;
-		this.type=type;
+
+	/**
+	 * Instantiates a new tx attribute type.
+	 *
+	 * @param name     the name
+	 * @param dataType the data type
+	 * @param type     the type
+	 */
+	TxAttributeType(String name, DataType dataType, AssociationType type) {
+		this.name = name;
+		this.dataType = dataType;
+		this.type = type;
 	}
 
+	/**
+	 * Gets the name.
+	 *
+	 * @return the name
+	 */
 	@Override
 	public String getName() {
 		return name;
 	}
 
+	/**
+	 * Gets the data type.
+	 *
+	 * @return the data type
+	 */
 	@Override
 	public DataType getDataType() {
 		return dataType;
 	}
 
+	/**
+	 * Gets the type.
+	 *
+	 * @return the type
+	 */
 	@Override
 	public AssociationType getType() {
 		return type;
diff --git a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxEvent.java b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxEvent.java
index ad57e01..df76234 100644
--- a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxEvent.java
+++ b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxEvent.java
@@ -1,3 +1,13 @@
+/*******************************************************************************
+ * Copyright (c) 2020 MINRES Technologies GmbH and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     MINRES Technologies GmbH - initial API and implementation
+ *******************************************************************************/
 package com.minres.scviewer.database.text;
 
 import com.minres.scviewer.database.EventKind;
@@ -5,50 +15,94 @@ import com.minres.scviewer.database.WaveformType;
 import com.minres.scviewer.database.tx.ITx;
 import com.minres.scviewer.database.tx.ITxEvent;
 
+/**
+ * The Class TxEvent.
+ */
 class TxEvent implements ITxEvent {
 
+	/** The loader. */
 	final TextDbLoader loader;
-	
+
+	/** The kind. */
 	final EventKind kind;
-	
+
+	/** The transaction. */
 	final long transaction;
-	
+
+	/** The time. */
 	final long time;
-	
+
+	/**
+	 * Instantiates a new tx event.
+	 *
+	 * @param loader      the loader
+	 * @param kind        the kind
+	 * @param transaction the transaction
+	 * @param time        the time
+	 */
 	TxEvent(TextDbLoader loader, EventKind kind, Long transaction, Long time) {
-		this.loader=loader;
+		this.loader = loader;
 		this.kind = kind;
 		this.transaction = transaction;
 		this.time = time;
 	}
 
+	/**
+	 * Duplicate.
+	 *
+	 * @return the i tx event
+	 * @throws CloneNotSupportedException the clone not supported exception
+	 */
 	@Override
-	public
-	ITxEvent duplicate() throws CloneNotSupportedException {
+	public ITxEvent duplicate() throws CloneNotSupportedException {
 		return new TxEvent(loader, kind, transaction, time);
 	}
 
+	/**
+	 * To string.
+	 *
+	 * @return the string
+	 */
 	@Override
-	public
-	String toString() {
-		return kind.toString()+"@"+time+" of tx #"+transaction;
+	public String toString() {
+		return kind.toString() + "@" + time + " of tx #" + transaction;
 	}
 
+	/**
+	 * Gets the type.
+	 *
+	 * @return the type
+	 */
 	@Override
 	public WaveformType getType() {
 		return WaveformType.TRANSACTION;
 	}
 
+	/**
+	 * Gets the kind.
+	 *
+	 * @return the kind
+	 */
 	@Override
 	public EventKind getKind() {
 		return kind;
 	}
 
+	/**
+	 * Gets the time.
+	 *
+	 * @return the time
+	 */
 	@Override
 	public Long getTime() {
 		return time;
 	}
 
+	/**
+	 * Gets the transaction.
+	 *
+	 * @return the transaction
+	 */
 	@Override
 	public ITx getTransaction() {
 		return loader.getTransaction(transaction);
diff --git a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxGenerator.java b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxGenerator.java
index dc55be7..d62feb1 100644
--- a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxGenerator.java
+++ b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxGenerator.java
@@ -1,5 +1,6 @@
 /*******************************************************************************
  * Copyright (c) 2012 IT Just working.
+ * Copyright (c) 2020 MINRES Technologies GmbH
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -16,39 +17,90 @@ import java.util.List;
 import com.minres.scviewer.database.IWaveform;
 import com.minres.scviewer.database.tx.ITxGenerator;
 
+/**
+ * The Class TxGenerator.
+ */
 class TxGenerator extends AbstractTxStream implements ITxGenerator {
 
+	/** The stream. */
 	TxStream stream;
-		
-	List<TxAttributeType> beginAttrs = new ArrayList<>();
-	
-	List<TxAttributeType> endAttrs= new ArrayList<>();
 
-	TxGenerator(TextDbLoader loader, Long id, String name, TxStream stream){
+	/** The begin attrs. */
+	List<TxAttributeType> beginAttrs = new ArrayList<>();
+
+	/** The end attrs. */
+	List<TxAttributeType> endAttrs = new ArrayList<>();
+
+	/**
+	 * Instantiates a new tx generator.
+	 *
+	 * @param loader the loader
+	 * @param id     the id
+	 * @param name   the name
+	 * @param stream the stream
+	 */
+	TxGenerator(TextDbLoader loader, Long id, String name, TxStream stream) {
 		super(loader, id, name);
-		this.stream=stream;
+		this.stream = stream;
+		stream.addChild(this);
 	}
-	
+
+	/**
+	 * Gets the stream.
+	 *
+	 * @return the stream
+	 */
 	@Override
-	public IWaveform getStream(){
+	public IWaveform getStream() {
 		return stream;
 	}
-	
+
+	/**
+	 * Checks if is same.
+	 *
+	 * @param other the other
+	 * @return true, if is same
+	 */
 	@Override
 	public boolean isSame(IWaveform other) {
-		return(other instanceof TxGenerator && this.getId().equals(other.getId()));
+		return (other instanceof TxGenerator && this.getId().equals(other.getId()));
 	}
-	
+
+	/**
+	 * Gets the begin attrs.
+	 *
+	 * @return the begin attrs
+	 */
 	public List<TxAttributeType> getBeginAttrs() {
 		return beginAttrs;
 	}
 
+	/**
+	 * Gets the end attrs.
+	 *
+	 * @return the end attrs
+	 */
 	public List<TxAttributeType> getEndAttrs() {
 		return endAttrs;
 	}
 
+	/**
+	 * Gets the kind.
+	 *
+	 * @return the kind
+	 */
 	@Override
 	public String getKind() {
 		return stream.getKind();
 	}
+
+	/**
+	 * Gets the width.
+	 *
+	 * @return the width
+	 */
+	@Override
+	public int getWidth() {
+		return stream.getWidth();
+	}
 }
diff --git a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxRelation.java b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxRelation.java
index 943fb05..78cd584 100644
--- a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxRelation.java
+++ b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxRelation.java
@@ -1,30 +1,66 @@
+/*******************************************************************************
+ * Copyright (c) 2020 MINRES Technologies GmbH and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     MINRES Technologies GmbH - initial API and implementation
+ *******************************************************************************/
 package com.minres.scviewer.database.text;
 
 import com.minres.scviewer.database.RelationType;
 import com.minres.scviewer.database.tx.ITx;
 import com.minres.scviewer.database.tx.ITxRelation;
 
+/**
+ * The Class TxRelation.
+ */
 class TxRelation implements ITxRelation {
 
+	/** The loader. */
 	final TextDbLoader loader;
-	
+
+	/** The scv relation. */
 	final ScvRelation scvRelation;
-	
+
+	/**
+	 * Instantiates a new tx relation.
+	 *
+	 * @param loader      the loader
+	 * @param scvRelation the scv relation
+	 */
 	public TxRelation(TextDbLoader loader, ScvRelation scvRelation) {
 		this.loader = loader;
 		this.scvRelation = scvRelation;
 	}
 
+	/**
+	 * Gets the relation type.
+	 *
+	 * @return the relation type
+	 */
 	@Override
 	public RelationType getRelationType() {
 		return scvRelation.relationType;
 	}
 
+	/**
+	 * Gets the source.
+	 *
+	 * @return the source
+	 */
 	@Override
 	public ITx getSource() {
 		return loader.getTransaction(scvRelation.source);
 	}
 
+	/**
+	 * Gets the target.
+	 *
+	 * @return the target
+	 */
 	@Override
 	public ITx getTarget() {
 		return loader.getTransaction(scvRelation.target);
diff --git a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxStream.java b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxStream.java
index c0ab7d0..4a346cd 100644
--- a/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxStream.java
+++ b/plugins/com.minres.scviewer.database.text/src/com/minres/scviewer/database/text/TxStream.java
@@ -1,5 +1,6 @@
 /*******************************************************************************
  * Copyright (c) 2012 IT Just working.
+ * Copyright (c) 2020 MINRES Technologies GmbH
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -12,23 +13,82 @@ package com.minres.scviewer.database.text;
 
 import com.minres.scviewer.database.IWaveform;
 
+/**
+ * The Class TxStream.
+ */
 class TxStream extends AbstractTxStream {
-	
+
+	/** The kind. */
 	final String kind;
-	
-	TxStream(TextDbLoader loader, Long id, String name, String kind){
+
+	/**
+	 * Instantiates a new tx stream.
+	 *
+	 * @param loader the loader
+	 * @param id     the id
+	 * @param name   the name
+	 * @param kind   the kind
+	 */
+	TxStream(TextDbLoader loader, Long id, String name, String kind) {
 		super(loader, id, name);
-		this.kind=kind;
-	}
-	
-	@Override
-	public boolean isSame(IWaveform other) {
-		return(other instanceof TxStream && this.getId().equals(other.getId()));
+		this.kind = kind;
 	}
 
+	/**
+	 * Checks if is same.
+	 *
+	 * @param other the other
+	 * @return true, if is same
+	 */
+	@Override
+	public boolean isSame(IWaveform other) {
+		return (other instanceof TxStream && this.getId().equals(other.getId()));
+	}
+
+	/**
+	 * Gets the kind.
+	 *
+	 * @return the kind
+	 */
 	@Override
 	public String getKind() {
 		return kind;
 	}
 
+	/** The max concurrency. */
+	private int maxConcurrency = 0;
+
+	/** The concurrency. */
+	private int concurrency = 0;
+
+	/**
+	 * Sets the concurrency.
+	 *
+	 * @param concurrency the new concurrency
+	 */
+	void setConcurrency(int concurrency) {
+		this.concurrency = concurrency;
+		if (concurrency > maxConcurrency)
+			maxConcurrency = concurrency;
+	}
+
+	/**
+	 * Gets the concurrency.
+	 *
+	 * @return the concurrency
+	 */
+	int getConcurrency() {
+		return this.concurrency;
+	}
+
+	/**
+	 * Gets the width.
+	 *
+	 * @return the width
+	 */
+	@Override
+	public int getWidth() {
+		return maxConcurrency;
+	}
+
 }
diff --git a/plugins/com.minres.scviewer.database/build.properties b/plugins/com.minres.scviewer.database/build.properties
index 7856cb9..f5c8f4f 100644
--- a/plugins/com.minres.scviewer.database/build.properties
+++ b/plugins/com.minres.scviewer.database/build.properties
@@ -1,5 +1,5 @@
 ###############################################################################
-# Copyright (c) 2014, 2015 MINRES Technologies GmbH and others.
+# Copyright (c) 2014, 2015 - 2020 MINRES Technologies GmbH and others.
 # All rights reserved. This program and the accompanying materials
 # are made available under the terms of the Eclipse Public License v1.0
 # which accompanies this distribution, and is available at
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/AssociationType.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/AssociationType.java
index e9e2437..26be0d0 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/AssociationType.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/AssociationType.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -10,6 +10,16 @@
  *******************************************************************************/
 package com.minres.scviewer.database;
 
+// TODO: Auto-generated Javadoc
+/**
+ * The Enum AssociationType.
+ */
 public enum AssociationType {
-	BEGIN, RECORD, END
+
+	/** The begin. */
+	BEGIN,
+	/** The record. */
+	RECORD,
+	/** The end. */
+	END
 }
\ No newline at end of file
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/BitValue.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/BitValue.java
index aae3703..32173d0 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/BitValue.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/BitValue.java
@@ -1,68 +1,125 @@
+/*******************************************************************************
+ * Copyright (c) 2020 MINRES Technologies GmbH and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     MINRES Technologies GmbH - initial API and implementation
+ *******************************************************************************/
 package com.minres.scviewer.database;
+
+/**
+ * The Enum BitValue.
+ */
 public enum BitValue {
-    ZERO,
-    ONE,
-    X,
-    Z;
 
-    private static final BitValue[] ORDINAL_TABLE = BitValue.values();
+	/** The zero. */
+	ZERO,
 
-    public static BitValue fromChar(char c) {
-        switch (c) {
-            case '0':
-                return ZERO;
-            case '1':
-                return ONE;
-            case 'x':
-            case 'X':
-                return X;
-            case 'z':
-            case 'Z':
-                return Z;
-            default:
-                throw new NumberFormatException("unknown digit " + c);
-        }
-    }
+	/** The one. */
+	ONE,
 
-    public char toChar() {
-        switch (this) {
-            case ZERO:
-                return '0';
-            case ONE:
-                return '1';
-            case X:
-                return 'x';
-            case Z:
-                return 'z';
-        }
+	/** The x. */
+	X,
 
-        return ' '; // Unreachable?
-    }
+	/** The z. */
+	Z;
 
-    public static BitValue fromInt(int i) {
-        if (i == 0) {
-            return ZERO;
-        } else {
-            return ONE;
-        }
-    }
+	/** The Constant ORDINAL_TABLE. */
+	private static final BitValue[] ORDINAL_TABLE = BitValue.values();
 
-    public int toInt() {
-        return (this == ONE) ? 1 : 0;
-    }
+	/**
+	 * From char.
+	 *
+	 * @param c the c
+	 * @return the bit value
+	 */
+	public static BitValue fromChar(char c) {
+		switch (c) {
+		case '0':
+			return ZERO;
+		case '1':
+			return ONE;
+		case 'x':
+		case 'X':
+			return X;
+		case 'z':
+		case 'Z':
+			return Z;
+		default:
+			throw new NumberFormatException("unknown digit " + c);
+		}
+	}
 
-    public static BitValue fromOrdinal(int ord) {
-        return ORDINAL_TABLE[ord];
-    }
+	/**
+	 * To char.
+	 *
+	 * @return the char
+	 */
+	public char toChar() {
+		switch (this) {
+		case ZERO:
+			return '0';
+		case ONE:
+			return '1';
+		case X:
+			return 'x';
+		case Z:
+			return 'z';
+		}
 
-    public int compare(BitValue other) {
-        if (this == ONE && other == ZERO) {
-            return 1;
-        } else if (this == ZERO && other == ONE) {
-            return -1;
-        } else {
-            // Either these are equal, or there is an X and Z, which match everything.
-            return 0;
-        }
-    }
+		return ' '; // Unreachable?
+	}
+
+	/**
+	 * From int.
+	 *
+	 * @param i the i
+	 * @return the bit value
+	 */
+	public static BitValue fromInt(int i) {
+		if (i == 0) {
+			return ZERO;
+		} else {
+			return ONE;
+		}
+	}
+
+	/**
+	 * To int.
+	 *
+	 * @return the int
+	 */
+	public int toInt() {
+		return (this == ONE) ? 1 : 0;
+	}
+
+	/**
+	 * From ordinal.
+	 *
+	 * @param ord the ord
+	 * @return the bit value
+	 */
+	public static BitValue fromOrdinal(int ord) {
+		return ORDINAL_TABLE[ord];
+	}
+
+	/**
+	 * Compare.
+	 *
+	 * @param other the other
+	 * @return the int
+	 */
+	public int compare(BitValue other) {
+		if (this == ONE && other == ZERO) {
+			return 1;
+		} else if (this == ZERO && other == ONE) {
+			return -1;
+		} else {
+			// Either these are equal, or there is an X and Z, which match everything.
+			return 0;
+		}
+	}
 }
\ No newline at end of file
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/BitVector.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/BitVector.java
index 7ca5888..c53fc27 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/BitVector.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/BitVector.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -10,34 +10,56 @@
  *******************************************************************************/
 package com.minres.scviewer.database;
 
+/**
+ * The Class BitVector.
+ */
 public class BitVector implements IEvent {
 
+	/** The width. */
 	private final int width;
 
+	/** The packed values. */
 	private int[] packedValues;
 
+	/**
+	 * Instantiates a new bit vector.
+	 *
+	 * @param netWidth the net width
+	 */
 	public BitVector(int netWidth) {
-		this.width=netWidth;
-		packedValues = new int[(netWidth+15)/16];
-		for(int i=0; i<packedValues.length; i++) packedValues[i]=0;
+		this.width = netWidth;
+		packedValues = new int[(netWidth + 15) / 16];
+		for (int i = 0; i < packedValues.length; i++)
+			packedValues[i] = 0;
 	}
 
+	/**
+	 * Sets the value.
+	 *
+	 * @param i     the i
+	 * @param value the value
+	 */
 	public void setValue(int i, BitValue value) {
-		int bitIndex = i*2;
+		int bitIndex = i * 2;
 		int wordOffset = bitIndex >> 5;
 		int bitOffset = bitIndex & 31;
 		packedValues[wordOffset] &= ~(3 << bitOffset);
 		packedValues[wordOffset] |= value.ordinal() << bitOffset;
 	}
 
+	/**
+	 * Gets the value.
+	 *
+	 * @return the value
+	 */
 	public char[] getValue() {
 		int bitOffset = 0;
 		int wordOffset = 0;
 		char[] res = new char[width];
 		// Copy values out of packed array
 		for (int i = 0; i < width; i++) {
-			int currentWord = (packedValues[wordOffset] >> bitOffset)&3;
-			res[width-i-1]=BitValue.fromInt(currentWord).toChar();
+			int currentWord = (packedValues[wordOffset] >> bitOffset) & 3;
+			res[width - i - 1] = BitValue.fromInt(currentWord).toChar();
 			bitOffset += 2;
 			if (bitOffset == 32) {
 				wordOffset++;
@@ -47,6 +69,11 @@ public class BitVector implements IEvent {
 		return res;
 	}
 
+	/**
+	 * Sets the value.
+	 *
+	 * @param value the new value
+	 */
 	public void setValue(char[] value) {
 		int bitIndex = width;
 		int wordOffset = bitIndex >> 4;
@@ -61,41 +88,61 @@ public class BitVector implements IEvent {
 		}
 	}
 
+	/**
+	 * Gets the width.
+	 *
+	 * @return the width
+	 */
 	public int getWidth() {
 		return width;
 	}
 
-	public String toString(){
+	/**
+	 * To string.
+	 *
+	 * @return the string
+	 */
+	public String toString() {
 		return new String(getValue());
 	}
 
-	public String toHexString(){
-		int resWidth=(width-1)/4+1;
-		char[] value=getValue();
+	/**
+	 * To hex string.
+	 *
+	 * @return the string
+	 */
+	public String toHexString() {
+		int resWidth = (width - 1) / 4 + 1;
+		char[] value = getValue();
 		char[] res = new char[resWidth];
-		for(int i=resWidth-1; i>=0; i--){
-			int digit=0;
-			for(int j=3; j>=0; j--){
-				if((4*i+j)<value.length) {
-					BitValue val = BitValue.fromChar(value[4*i+j]);
-					switch(val) {
+		for (int i = resWidth - 1; i >= 0; i--) {
+			int digit = 0;
+			for (int j = 3; j >= 0; j--) {
+				if ((4 * i + j) < value.length) {
+					BitValue val = BitValue.fromChar(value[4 * i + j]);
+					switch (val) {
 					case X:
 					case Z:
-						res[i]=val.toChar();
+						res[i] = val.toChar();
 						continue;
 					case ONE:
-						digit+=1<<(3-j);
+						digit += 1 << (3 - j);
 						break;
 					default:
 						break;
 					}
 				}
 			}
-			res[i]=Character.forDigit(digit, 16); //((digit < 10) ? '0' + digit : 'a' + digit -10)
+			res[i] = Character.forDigit(digit, 16); // ((digit < 10) ? '0' + digit : 'a' + digit -10)
 		}
-		return new String(res);		
+		return new String(res);
 	}
 
+	/**
+	 * To unsigned value.
+	 *
+	 * @return the long
+	 */
 	public long toUnsignedValue() {
 		long res = 0;
 		int bitOffset = 0;
@@ -103,10 +150,11 @@ public class BitVector implements IEvent {
 		int currentWord = 0;
 		// Copy values out of packed array
 		for (int i = 0; i < width; i++) {
-			if(bitOffset==0) currentWord = packedValues[wordOffset];
+			if (bitOffset == 0)
+				currentWord = packedValues[wordOffset];
 			switch (currentWord & 3) {
 			case 1:
-				res|=1<<i;
+				res |= 1 << i;
 				break;
 			case 2:
 			case 3:
@@ -125,20 +173,26 @@ public class BitVector implements IEvent {
 		return res;
 	}
 
+	/**
+	 * To signed value.
+	 *
+	 * @return the long
+	 */
 	public long toSignedValue() {
 		long res = 0;
 		int bitOffset = 0;
 		int wordOffset = 0;
 		int currentWord = 0;
-		int lastVal=0;
+		int lastVal = 0;
 		// Copy values out of packed array
 		for (int i = 0; i < width; i++) {
-			if(bitOffset==0) currentWord = packedValues[wordOffset];
-			lastVal=0;
+			if (bitOffset == 0)
+				currentWord = packedValues[wordOffset];
+			lastVal = 0;
 			switch (currentWord & 3) {
 			case 1:
-				res|=1<<i;
-				lastVal=1;
+				res |= 1 << i;
+				lastVal = 1;
 				break;
 			case 2:
 			case 3:
@@ -153,24 +207,39 @@ public class BitVector implements IEvent {
 				currentWord >>= 2;
 			}
 		}
-		if(lastVal!=0)
-			res |= -1l<<width;
+		if (lastVal != 0)
+			res |= -1l << width;
 		return res;
 	}
 
+	/**
+	 * Gets the kind.
+	 *
+	 * @return the kind
+	 */
 	@Override
 	public EventKind getKind() {
 		return EventKind.SINGLE;
 	}
 
+	/**
+	 * Gets the type.
+	 *
+	 * @return the type
+	 */
 	@Override
 	public WaveformType getType() {
 		return WaveformType.SIGNAL;
 	}
 
+	/**
+	 * Duplicate.
+	 *
+	 * @return the i event
+	 * @throws CloneNotSupportedException the clone not supported exception
+	 */
 	@Override
 	public IEvent duplicate() throws CloneNotSupportedException {
-		return (IEvent)this.clone();
+		return (IEvent) this.clone();
 	}
 }
-
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/DataType.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/DataType.java
index a323048..09cce50 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/DataType.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/DataType.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -10,19 +10,47 @@
  *******************************************************************************/
 package com.minres.scviewer.database;
 
+/**
+ * The Enum DataType.
+ */
 public enum DataType {
-	BOOLEAN, // bool
-	ENUMERATION, // enum
-	INTEGER, // char, short, int, long, long long, sc_int, sc_bigint
+
+	/** The boolean. */
+	BOOLEAN,
+	/** The enumeration. */
+	// bool
+	ENUMERATION,
+	/** The integer. */
+	// enum
+	INTEGER,
+	/** The unsigned. */
+	// char, short, int, long, long long, sc_int, sc_bigint
 	UNSIGNED, // unsigned { char, short, int, long, long long }, sc_uint,
-				// sc_biguint
-	FLOATING_POINT_NUMBER, // float, double
-	BIT_VECTOR, // sc_bit, sc_bv
-	LOGIC_VECTOR, // sc_logic, sc_lv
-	FIXED_POINT_INTEGER, // sc_fixed
-	UNSIGNED_FIXED_POINT_INTEGER, // sc_ufixed
-	RECORD, // struct/class
-	POINTER, // T*
-	ARRAY, // T[N]
+	/** The floating point number. */
+	// sc_biguint
+	FLOATING_POINT_NUMBER,
+	/** The bit vector. */
+	// float, double
+	BIT_VECTOR,
+	/** The logic vector. */
+	// sc_bit, sc_bv
+	LOGIC_VECTOR,
+	/** The fixed point integer. */
+	// sc_logic, sc_lv
+	FIXED_POINT_INTEGER,
+	/** The unsigned fixed point integer. */
+	// sc_fixed
+	UNSIGNED_FIXED_POINT_INTEGER,
+	/** The record. */
+	// sc_ufixed
+	RECORD,
+	/** The pointer. */
+	// struct/class
+	POINTER,
+	/** The array. */
+	// T*
+	ARRAY,
+	/** The string. */
+	// T[N]
 	STRING // string, std::string
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/DoubleVal.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/DoubleVal.java
index 34c1541..fc90023 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/DoubleVal.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/DoubleVal.java
@@ -1,23 +1,58 @@
+/*******************************************************************************
+ * Copyright (c) 2020 MINRES Technologies GmbH and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     MINRES Technologies GmbH - initial API and implementation
+ *******************************************************************************/
 package com.minres.scviewer.database;
 
+/**
+ * The Class DoubleVal.
+ */
 public class DoubleVal implements IEvent {
 
+	/** The value. */
 	public final double value;
-	
+
+	/**
+	 * Instantiates a new double val.
+	 *
+	 * @param value the value
+	 */
 	public DoubleVal(double value) {
-		this.value=value;
+		this.value = value;
 	}
 
+	/**
+	 * Gets the kind.
+	 *
+	 * @return the kind
+	 */
 	@Override
 	public EventKind getKind() {
 		return EventKind.SINGLE;
 	}
 
+	/**
+	 * Gets the type.
+	 *
+	 * @return the type
+	 */
 	@Override
 	public WaveformType getType() {
 		return WaveformType.SIGNAL;
 	}
 
+	/**
+	 * Duplicate.
+	 *
+	 * @return the i event
+	 * @throws CloneNotSupportedException the clone not supported exception
+	 */
 	@Override
 	public IEvent duplicate() throws CloneNotSupportedException {
 		return (IEvent) clone();
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/EventKind.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/EventKind.java
index f2efcf7..fbc3f09 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/EventKind.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/EventKind.java
@@ -1,5 +1,24 @@
+/*******************************************************************************
+ * Copyright (c) 2020 MINRES Technologies GmbH and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     MINRES Technologies GmbH - initial API and implementation
+ *******************************************************************************/
 package com.minres.scviewer.database;
 
+/**
+ * The Enum EventKind.
+ */
 public enum EventKind {
-	SINGLE, BEGIN, END
+
+	/** The single. */
+	SINGLE,
+	/** The begin. */
+	BEGIN,
+	/** The end. */
+	END
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/HierNode.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/HierNode.java
index 5fda638..b38b285 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/HierNode.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/HierNode.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -15,76 +15,154 @@ import java.beans.PropertyChangeSupport;
 import java.util.ArrayList;
 import java.util.List;
 
+/**
+ * The Class HierNode.
+ */
 public class HierNode implements IHierNode {
 
+	/** The name. */
 	protected String name;
-	
+
+	/** The parent. */
 	protected IHierNode parent = null;
-	
+
+	/** The childs. */
 	protected ArrayList<IHierNode> childs;
-	
+
+	/** The pcs. */
 	protected PropertyChangeSupport pcs;
 
+	/**
+	 * Instantiates a new hier node.
+	 */
 	public HierNode() {
 		childs = new ArrayList<>();
-		pcs=new PropertyChangeSupport(this);
+		pcs = new PropertyChangeSupport(this);
 	}
 
+	/**
+	 * Instantiates a new hier node.
+	 *
+	 * @param name the name
+	 */
 	public HierNode(String name) {
 		this();
-		this.name=name;
+		this.name = name;
 	}
 
+	/**
+	 * Instantiates a new hier node.
+	 *
+	 * @param name   the name
+	 * @param parent the parent
+	 */
 	public HierNode(String name, IHierNode parent) {
 		this();
-		this.name=name;
-		this.parent=parent;
+		this.name = name;
+		this.parent = parent;
 	}
 
+	/**
+	 * Adds the property change listener.
+	 *
+	 * @param l the l
+	 */
 	@Override
 	public void addPropertyChangeListener(PropertyChangeListener l) {
 		pcs.addPropertyChangeListener(l);
 	}
 
+	/**
+	 * Removes the property change listener.
+	 *
+	 * @param l the l
+	 */
 	@Override
 	public void removePropertyChangeListener(PropertyChangeListener l) {
 		pcs.removePropertyChangeListener(l);
 	}
 
-
+	/**
+	 * Gets the full name.
+	 *
+	 * @return the full name
+	 */
 	@Override
 	public String getFullName() {
-		if(parent!=null)
-			return parent.getFullName()+"."+name;
+		if (parent != null)
+			return parent.getFullName() + "." + name;
 		else
 			return name;
 	}
 
+	/**
+	 * Gets the name.
+	 *
+	 * @return the name
+	 */
 	@Override
 	public String getName() {
 		return name;
 	}
 
+	/**
+	 * Sets the name.
+	 *
+	 * @param name the new name
+	 */
 	@Override
 	public void setName(String name) {
-		this.name=name;
+		this.name = name;
 	}
 
+	/**
+	 * Sets the parent.
+	 *
+	 * @param parent the new parent
+	 */
 	@Override
 	public void setParent(IHierNode parent) {
-		this.parent=parent;
+		this.parent = parent;
 	}
 
+	/**
+	 * Gets the child nodes.
+	 *
+	 * @return the child nodes
+	 */
 	@Override
 	public List<IHierNode> getChildNodes() {
 		return childs;
 	}
 
+	/**
+	 * Adds the child.
+	 *
+	 * @param child the child
+	 */
+	public void addChild(IHierNode child) {
+		if (!childs.contains(child)) {
+			childs.add(child);
+			child.setParent(this);
+		}
+	}
+
+	/**
+	 * Compare to.
+	 *
+	 * @param o the o
+	 * @return the int
+	 */
 	@Override
 	public int compareTo(IHierNode o) {
 		return getFullName().compareTo(o.getFullName());
 	}
 
+	/**
+	 * Derive waveform.
+	 *
+	 * @return the i derived waveform
+	 */
 	@Override
 	public IDerivedWaveform deriveWaveform() {
 		return null;
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IDerivedWaveform.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IDerivedWaveform.java
index 10beacd..60205db 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IDerivedWaveform.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IDerivedWaveform.java
@@ -15,5 +15,10 @@ package com.minres.scviewer.database;
  */
 public interface IDerivedWaveform extends IWaveform {
 
+	/**
+	 * Adds the source waveform.
+	 *
+	 * @param waveform the waveform
+	 */
 	void addSourceWaveform(IWaveform waveform);
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IEvent.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IEvent.java
index 6d0bf25..08d235f 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IEvent.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IEvent.java
@@ -1,11 +1,40 @@
+/*******************************************************************************
+ * Copyright (c) 2020 MINRES Technologies GmbH and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     MINRES Technologies GmbH - initial API and implementation
+ *******************************************************************************/
 package com.minres.scviewer.database;
 
+/**
+ * The Interface IEvent.
+ */
 public interface IEvent {
 
+	/**
+	 * Duplicate.
+	 *
+	 * @return the i event
+	 * @throws CloneNotSupportedException the clone not supported exception
+	 */
 	public IEvent duplicate() throws CloneNotSupportedException;
 
+	/**
+	 * Gets the kind.
+	 *
+	 * @return the kind
+	 */
 	public EventKind getKind();
-	
+
+	/**
+	 * Gets the type.
+	 *
+	 * @return the type
+	 */
 	public WaveformType getType();
 
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IHierNode.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IHierNode.java
index e91ea84..e81576e 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IHierNode.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IHierNode.java
@@ -16,25 +16,22 @@ import java.util.List;
 /**
  * The Interface IHierNode.
  */
-public interface IHierNode extends Comparable<IHierNode>{
-	
+public interface IHierNode extends Comparable<IHierNode> {
+
 	/**
 	 * Attach a non-null PropertyChangeListener to this object.
 	 * 
-	 * @param l
-	 *            a non-null PropertyChangeListener instance
-	 * @throws IllegalArgumentException
-	 *             if the parameter is null
+	 * @param l a non-null PropertyChangeListener instance
+	 * @throws IllegalArgumentException if the parameter is null
 	 */
 	public void addPropertyChangeListener(PropertyChangeListener l);
 
 	/**
 	 * Remove a PropertyChangeListener from this component.
 	 * 
-	 * @param l
-	 *            a PropertyChangeListener instance
+	 * @param l a PropertyChangeListener instance
 	 */
-	public void removePropertyChangeListener(PropertyChangeListener l) ;
+	public void removePropertyChangeListener(PropertyChangeListener l);
 
 	/**
 	 * Gets the full name.
@@ -42,21 +39,21 @@ public interface IHierNode extends Comparable<IHierNode>{
 	 * @return the full name
 	 */
 	public String getFullName();
-	
+
 	/**
 	 * Gets the name.
 	 *
 	 * @return the name
 	 */
 	public String getName();
-	
+
 	/**
 	 * Sets the name.
 	 *
 	 * @param name the new name
 	 */
 	public void setName(String name);
-	
+
 	/**
 	 * Sets the parent.
 	 *
@@ -70,7 +67,7 @@ public interface IHierNode extends Comparable<IHierNode>{
 	 * @return the child nodes
 	 */
 	public List<IHierNode> getChildNodes();
-	
+
 	/**
 	 * Derive waveform.
 	 *
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveform.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveform.java
index 85856a3..9e1bd83 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveform.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveform.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -12,22 +12,70 @@ package com.minres.scviewer.database;
 
 import java.util.NavigableMap;
 
+/**
+ * The Interface IWaveform.
+ *
+ * @author eyck
+ */
 public interface IWaveform extends IHierNode {
 
+	/**
+	 * Gets the id.
+	 *
+	 * @return the id
+	 */
 	public Long getId();
 
+	/**
+	 * Checks if is same.
+	 *
+	 * @param other the other
+	 * @return true, if is same
+	 */
 	public boolean isSame(IWaveform other);
 
+	/**
+	 * Gets the events.
+	 *
+	 * @return the events
+	 */
 	public NavigableMap<Long, IEvent[]> getEvents();
 
+	/**
+	 * Gets the events at time.
+	 *
+	 * @param time the time
+	 * @return the events at time
+	 */
 	public IEvent[] getEventsAtTime(Long time);
 
+	/**
+	 * Gets the events before time.
+	 *
+	 * @param time the time
+	 * @return the events before time
+	 */
 	public IEvent[] getEventsBeforeTime(Long time);
-	
+
+	/**
+	 * Gets the type.
+	 *
+	 * @return the type
+	 */
 	public WaveformType getType();
-	
+
+	/**
+	 * Gets the kind.
+	 *
+	 * @return the kind
+	 */
 	public String getKind();
-	
+
+	/**
+	 * Gets the width.
+	 *
+	 * @return the width
+	 */
 	public int getWidth();
 
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveformDb.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveformDb.java
index 2dee198..435c6f7 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveformDb.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveformDb.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -13,21 +13,58 @@ package com.minres.scviewer.database;
 import java.io.File;
 import java.util.List;
 
-
+/**
+ * The Interface IWaveformDb.
+ */
 public interface IWaveformDb extends IHierNode {
 
+	/**
+	 * Gets the max time.
+	 *
+	 * @return the max time
+	 */
 	public Long getMaxTime();
-	
+
+	/**
+	 * Gets the stream by name.
+	 *
+	 * @param name the name
+	 * @return the stream by name
+	 */
 	public IWaveform getStreamByName(String name);
-	
+
+	/**
+	 * Gets the all waves.
+	 *
+	 * @return the all waves
+	 */
 	public List<IWaveform> getAllWaves();
-	
+
+	/**
+	 * Gets the all relation types.
+	 *
+	 * @return the all relation types
+	 */
 	public List<RelationType> getAllRelationTypes();
-	
+
+	/**
+	 * Load.
+	 *
+	 * @param inp the inp
+	 * @return true, if successful
+	 */
 	public boolean load(File inp);
 
+	/**
+	 * Checks if is loaded.
+	 *
+	 * @return true, if is loaded
+	 */
 	public boolean isLoaded();
 
+	/**
+	 * Clear.
+	 */
 	public void clear();
 
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveformDbFactory.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveformDbFactory.java
index bfc39f6..cb40d78 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveformDbFactory.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveformDbFactory.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -10,7 +10,15 @@
  *******************************************************************************/
 package com.minres.scviewer.database;
 
+/**
+ * A factory for creating IWaveformDb objects.
+ */
 public interface IWaveformDbFactory {
 
+	/**
+	 * Gets the database.
+	 *
+	 * @return the database
+	 */
 	IWaveformDb getDatabase();
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveformDbLoader.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveformDbLoader.java
index 0042008..099fa63 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveformDbLoader.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/IWaveformDbLoader.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -13,15 +13,66 @@ package com.minres.scviewer.database;
 import java.io.File;
 import java.util.Collection;
 
+/**
+ * The Interface IWaveformDbLoader.
+ */
 public interface IWaveformDbLoader {
+//	static final String STREAM_ADDED = "StreamAdded";
+//	
+//	static final String GENERATOR_ADDED = "GeneratorAdded";
+//	
+//	static final String LOADING_FINISHED = "LoadingFinished";
+//	/**
+//	 * Attach a non-null PropertyChangeListener to this object.
+//	 * 
+//	 * @param l
+//	 *            a non-null PropertyChangeListener instance
+//	 * @throws IllegalArgumentException
+//	 *             if the parameter is null
+//	 */
+//	public void addPropertyChangeListener(PropertyChangeListener l);
+//
+//	/**
+//	 * Remove a PropertyChangeListener from this component.
+//	 * 
+//	 * @param l
+//	 *            a PropertyChangeListener instance
+//	 */
+//	public void removePropertyChangeListener(PropertyChangeListener l) ;
 
+	/**
+	 * Load.
+	 *
+	 * @param db  the db
+	 * @param inp the inp
+	 * @return true, if successful
+	 * @throws InputFormatException the input format exception
+	 */
 	public boolean load(IWaveformDb db, File inp) throws InputFormatException;
-	
+
+	/**
+	 * Gets the max time.
+	 *
+	 * @return the max time
+	 */
 	public Long getMaxTime();
-	
-	public Collection<IWaveform> getAllWaves() ;
-	
-	public Collection<RelationType> getAllRelationTypes() ;
-	
+
+	/**
+	 * Gets the all waves.
+	 *
+	 * @return the all waves
+	 */
+	public Collection<IWaveform> getAllWaves();
+
+	/**
+	 * Gets the all relation types.
+	 *
+	 * @return the all relation types
+	 */
+	public Collection<RelationType> getAllRelationTypes();
+
+	/**
+	 * Dispose.
+	 */
 	public void dispose();
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/InputFormatException.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/InputFormatException.java
index e116321..2ed0124 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/InputFormatException.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/InputFormatException.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -10,11 +10,12 @@
  *******************************************************************************/
 package com.minres.scviewer.database;
 
+/**
+ * The Class InputFormatException.
+ */
 public class InputFormatException extends Exception {
 
-	/**
-	 * 
-	 */
+	/** The Constant serialVersionUID. */
 	private static final long serialVersionUID = 8676129878197783368L;
 
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/RelationType.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/RelationType.java
index 16de19c..3fe2ceb 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/RelationType.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/RelationType.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -12,40 +12,74 @@ package com.minres.scviewer.database;
 
 import java.io.Serializable;
 
+/**
+ * The Class RelationType.
+ */
 public class RelationType implements Serializable {
-	/**
-	 * 
-	 */
+
+	/** The Constant serialVersionUID. */
 	private static final long serialVersionUID = 6394859077558971735L;
 
+	/** The name. */
 	private String name;
 
+	/**
+	 * Instantiates a new relation type.
+	 *
+	 * @param name the name
+	 */
 	RelationType(String name) {
 		super();
 		this.name = name;
 	}
 
+	/**
+	 * Gets the name.
+	 *
+	 * @return the name
+	 */
 	public String getName() {
 		return name;
 	}
 
+	/**
+	 * Sets the name.
+	 *
+	 * @param name the new name
+	 */
 	public void setName(String name) {
 		this.name = name;
 	}
-	
-	public String toString(){
+
+	/**
+	 * To string.
+	 *
+	 * @return the string
+	 */
+	public String toString() {
 		return name;
 	}
-	
+
+	/**
+	 * Hash code.
+	 *
+	 * @return the int
+	 */
 	@Override
 	public int hashCode() {
 		return name.hashCode();
 	}
-	
+
+	/**
+	 * Equals.
+	 *
+	 * @param obj the obj
+	 * @return true, if successful
+	 */
 	@Override
 	public boolean equals(Object obj) {
-		if(obj instanceof RelationType)
-			return name.equals(((RelationType)obj).name);
+		if (obj instanceof RelationType)
+			return name.equals(((RelationType) obj).name);
 		else
 			return false;
 	}
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/RelationTypeFactory.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/RelationTypeFactory.java
index 582805b..81336df 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/RelationTypeFactory.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/RelationTypeFactory.java
@@ -1,22 +1,46 @@
+/*******************************************************************************
+ * Copyright (c) 2020 MINRES Technologies GmbH and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     MINRES Technologies GmbH - initial API and implementation
+ *******************************************************************************/
 package com.minres.scviewer.database;
 
 import java.util.HashMap;
 
+/**
+ * A factory for creating RelationType objects.
+ */
 public class RelationTypeFactory {
-	
-	public static RelationType create(String name){
-		if(registry.containsKey(name)){
+
+	/**
+	 * Creates the.
+	 *
+	 * @param name the name
+	 * @return the relation type
+	 */
+	public static RelationType create(String name) {
+		if (registry.containsKey(name)) {
 			return registry.get(name);
-		}else{
+		} else {
 			RelationType relType = new RelationType(name);
 			registry.put(name, relType);
 			return relType;
 		}
-		
+
 	}
 
-	private RelationTypeFactory() {}
-	
+	/**
+	 * Instantiates a new relation type factory.
+	 */
+	private RelationTypeFactory() {
+	}
+
+	/** The registry. */
 	private static HashMap<String, RelationType> registry = new HashMap<>();
 
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/WaveformType.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/WaveformType.java
index 9e56f65..209f3c9 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/WaveformType.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/WaveformType.java
@@ -1,5 +1,24 @@
+/*******************************************************************************
+ * Copyright (c) 2020 MINRES Technologies GmbH and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     MINRES Technologies GmbH - initial API and implementation
+ *******************************************************************************/
 package com.minres.scviewer.database;
 
+/**
+ * The Enum WaveformType.
+ */
 public enum WaveformType {
-	SIGNAL, TRANSACTION, FILTER
+
+	/** The signal. */
+	SIGNAL,
+	/** The transaction. */
+	TRANSACTION,
+	/** The filter. */
+	FILTER
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/internal/WaveformDb.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/internal/WaveformDb.java
index 32d20e8..5e548e5 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/internal/WaveformDb.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/internal/WaveformDb.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -25,67 +25,114 @@ import com.minres.scviewer.database.IWaveformDb;
 import com.minres.scviewer.database.IWaveformDbLoader;
 import com.minres.scviewer.database.RelationType;
 
+/**
+ * The Class WaveformDb.
+ */
 public class WaveformDb extends HierNode implements IWaveformDb {
 
-	private static List<IWaveformDbLoader> loaders=new LinkedList<>();
+	/** The loaders. */
+	private static List<IWaveformDbLoader> loaders = new LinkedList<>();
 
+	/** The loaded. */
 	private boolean loaded;
 
+	/** The relation types. */
 	private List<RelationType> relationTypes;
-	
+
+	/** The waveforms. */
 	private Map<String, IWaveform> waveforms;
 
+	/** The max time. */
 	private Long maxTime;
-	
-	
-	public synchronized void bind(IWaveformDbLoader loader){
+
+	/**
+	 * Bind.
+	 *
+	 * @param loader the loader
+	 */
+	public synchronized void bind(IWaveformDbLoader loader) {
 		loaders.add(loader);
 	}
 
-	public synchronized void unbind(IWaveformDbLoader loader){
+	/**
+	 * Unbind.
+	 *
+	 * @param loader the loader
+	 */
+	public synchronized void unbind(IWaveformDbLoader loader) {
 		loaders.remove(loader);
 	}
 
-	
+	/**
+	 * Gets the loaders.
+	 *
+	 * @return the loaders
+	 */
 	public static List<IWaveformDbLoader> getLoaders() {
 		return Collections.unmodifiableList(loaders);
 	}
 
+	/**
+	 * Instantiates a new waveform db.
+	 */
 	public WaveformDb() {
 		super();
 		waveforms = new HashMap<>();
-		relationTypes=new ArrayList<>();
-		maxTime=0L;
+		relationTypes = new ArrayList<>();
+		maxTime = 0L;
 	}
 
+	/**
+	 * Gets the max time.
+	 *
+	 * @return the max time
+	 */
 	@Override
 	public Long getMaxTime() {
 		return maxTime;
 	}
 
+	/**
+	 * Gets the stream by name.
+	 *
+	 * @param name the name
+	 * @return the stream by name
+	 */
 	@Override
 	public IWaveform getStreamByName(String name) {
 		return waveforms.get(name);
 	}
 
+	/**
+	 * Gets the all waves.
+	 *
+	 * @return the all waves
+	 */
 	@Override
 	public List<IWaveform> getAllWaves() {
 		return new ArrayList<>(waveforms.values());
 	}
 
+	/**
+	 * Load.
+	 *
+	 * @param inp the inp
+	 * @return true, if successful
+	 */
 	@Override
-	public boolean load(File inp){
-		for(IWaveformDbLoader loader:loaders){
+	public boolean load(File inp) {
+		for (IWaveformDbLoader loader : loaders) {
 			try {
-				if(loader.load(this, inp)){
-					for(IWaveform w:loader.getAllWaves()){
-						waveforms.put(w.getFullName(),w);
+				if (loader.load(this, inp)) {
+					for (IWaveform w : loader.getAllWaves()) {
+						waveforms.put(w.getFullName(), w);
 					}
-					if(loader.getMaxTime()>maxTime){
-						maxTime=loader.getMaxTime();
+					if (loader.getMaxTime() > maxTime) {
+						maxTime = loader.getMaxTime();
 					}
-					if(name==null) name=getFileBasename(inp.getName());
-					buildHierarchyNodes() ;
+					if (name == null)
+						name = getFileBasename(inp.getName());
+					buildHierarchyNodes();
 					relationTypes.addAll(loader.getAllRelationTypes());
 					pcs.firePropertyChange("WAVEFORMS", null, waveforms);
 					pcs.firePropertyChange("CHILDS", null, childs);
@@ -95,67 +142,94 @@ public class WaveformDb extends HierNode implements IWaveformDb {
 			} catch (Exception e) {
 				return false;
 			}
-		}		
+		}
 		return false;
 	}
 
+	/**
+	 * Gets the file basename.
+	 *
+	 * @param f the f
+	 * @return the file basename
+	 */
 	protected static String getFileBasename(String f) {
-	    String ext = "";
-	    int i = f.lastIndexOf('.');
-	    if (i > 0 &&  i < f.length() - 1) {
-	      ext = f.substring(0, i);
-	    }
-	    return ext;
-	  }
+		String ext = "";
+		int i = f.lastIndexOf('.');
+		if (i > 0 && i < f.length() - 1) {
+			ext = f.substring(0, i);
+		}
+		return ext;
+	}
 
+	/**
+	 * Clear.
+	 */
 	@Override
 	public void clear() {
 		waveforms.clear();
 		childs.clear();
-		loaded=false;
+		loaded = false;
 	}
 
+	/**
+	 * Checks if is loaded.
+	 *
+	 * @return true, if is loaded
+	 */
 	public boolean isLoaded() {
 		return loaded;
 	}
 
+	/**
+	 * Builds the hierarchy nodes.
+	 */
 	private void buildHierarchyNodes() {
-		for(IWaveform stream:getAllWaves()){
+		for (IWaveform stream : getAllWaves()) {
 			String[] hier = stream.getName().split("\\.");
 			IHierNode node = this;
-			for(int i=0; i<hier.length-1; ++i){
+			for (int i = 0; i < hier.length - 1; ++i) {
 				String name = hier[i];
 				IHierNode childNode = null;
 				for (IHierNode n : node.getChildNodes()) {
 					if (n.getName().equals(name)) {
-						childNode=n;
+						childNode = n;
 						break;
 					}
 				}
-				if(childNode != null) {
+				if (childNode != null) {
 					node = childNode;
 					break;
 				}
 				HierNode newNode = new HierNode(name, node);
 				node.getChildNodes().add(newNode);
-				node=newNode;
-					
+				node = newNode;
+
 			}
 			node.getChildNodes().add(stream);
 			stream.setParent(node);
-			stream.setName(hier[hier.length-1]);
+			stream.setName(hier[hier.length - 1]);
 		}
 		sortRecursive(this);
 	}
 
+	/**
+	 * Sort recursive.
+	 *
+	 * @param node the node
+	 */
 	private void sortRecursive(IHierNode node) {
 		Collections.sort(node.getChildNodes(), (IHierNode o1, IHierNode o2) -> o1.getName().compareTo(o2.getName()));
-		for(IHierNode n:node.getChildNodes()) {
-			if(!n.getChildNodes().isEmpty())
+		for (IHierNode n : node.getChildNodes()) {
+			if (!n.getChildNodes().isEmpty())
 				sortRecursive(n);
 		}
 	}
 
+	/**
+	 * Gets the all relation types.
+	 *
+	 * @return the all relation types
+	 */
 	@Override
 	public List<RelationType> getAllRelationTypes() {
 		return relationTypes;
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/internal/WaveformDbFactory.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/internal/WaveformDbFactory.java
index 08b237d..3fb710c 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/internal/WaveformDbFactory.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/internal/WaveformDbFactory.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -17,12 +17,20 @@ import com.minres.scviewer.database.IWaveformDb;
 import com.minres.scviewer.database.IWaveformDbFactory;
 
 /**
- * @author eyck
+ * A factory for creating WaveformDb objects.
  *
+ * @author eyck
  */
 public class WaveformDbFactory implements IWaveformDbFactory {
 
-	/* (non-Javadoc)
+	/**
+	 * Gets the database.
+	 *
+	 * @return the database
+	 */
+	/*
+	 * (non-Javadoc)
+	 * 
 	 * @see com.minres.scviewer.database.IWaveformDbFactory#getDatabase()
 	 */
 	@Override
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITx.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITx.java
index 73e72d7..524a70a 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITx.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITx.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -15,23 +15,71 @@ import java.util.List;
 
 import com.minres.scviewer.database.IWaveform;
 
-public interface ITx extends Comparable<ITx>{
+/**
+ * The Interface ITx.
+ */
+public interface ITx extends Comparable<ITx> {
 
+	/**
+	 * Gets the id.
+	 *
+	 * @return the id
+	 */
 	public Long getId();
-	
+
+	/**
+	 * Gets the stream.
+	 *
+	 * @return the stream
+	 */
 	public IWaveform getStream();
-	
+
+	/**
+	 * Gets the generator.
+	 *
+	 * @return the generator
+	 */
 	public ITxGenerator getGenerator();
-	
+
+	/**
+	 * Gets the begin time.
+	 *
+	 * @return the begin time
+	 */
 	public Long getBeginTime();
-	
+
+	/**
+	 * Gets the end time.
+	 *
+	 * @return the end time
+	 */
 	public Long getEndTime();
-	
+
+	/**
+	 * Gets the concurrency index.
+	 *
+	 * @return the concurrency index
+	 */
 	public int getConcurrencyIndex();
-	
+
+	/**
+	 * Gets the attributes.
+	 *
+	 * @return the attributes
+	 */
 	public List<ITxAttribute> getAttributes();
-	
+
+	/**
+	 * Gets the incoming relations.
+	 *
+	 * @return the incoming relations
+	 */
 	public Collection<ITxRelation> getIncomingRelations();
 
+	/**
+	 * Gets the outgoing relations.
+	 *
+	 * @return the outgoing relations
+	 */
 	public Collection<ITxRelation> getOutgoingRelations();
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxAttribute.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxAttribute.java
index 1e06781..39c4a6c 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxAttribute.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxAttribute.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -10,6 +10,15 @@
  *******************************************************************************/
 package com.minres.scviewer.database.tx;
 
+/**
+ * The Interface ITxAttribute.
+ */
 public interface ITxAttribute extends ITxAttributeType {
+
+	/**
+	 * Gets the value.
+	 *
+	 * @return the value
+	 */
 	public Object getValue();
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxAttributeType.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxAttributeType.java
index fe21390..e204094 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxAttributeType.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxAttributeType.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -13,8 +13,29 @@ package com.minres.scviewer.database.tx;
 import com.minres.scviewer.database.AssociationType;
 import com.minres.scviewer.database.DataType;
 
+/**
+ * The Interface ITxAttributeType.
+ */
 public interface ITxAttributeType {
+
+	/**
+	 * Gets the name.
+	 *
+	 * @return the name
+	 */
 	public String getName();
+
+	/**
+	 * Gets the data type.
+	 *
+	 * @return the data type
+	 */
 	public DataType getDataType();
+
+	/**
+	 * Gets the type.
+	 *
+	 * @return the type
+	 */
 	public AssociationType getType();
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxEvent.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxEvent.java
index 1aada15..7c4930a 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxEvent.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxEvent.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -12,9 +12,22 @@ package com.minres.scviewer.database.tx;
 
 import com.minres.scviewer.database.IEvent;
 
+/**
+ * The Interface ITxEvent.
+ */
 public interface ITxEvent extends IEvent {
 
+	/**
+	 * Gets the time.
+	 *
+	 * @return the time
+	 */
 	public Long getTime();
-	
-	public ITx getTransaction();	
+
+	/**
+	 * Gets the transaction.
+	 *
+	 * @return the transaction
+	 */
+	public ITx getTransaction();
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxGenerator.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxGenerator.java
index 7226b0c..5daf7bb 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxGenerator.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxGenerator.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -12,8 +12,16 @@ package com.minres.scviewer.database.tx;
 
 import com.minres.scviewer.database.IWaveform;
 
+/**
+ * The Interface ITxGenerator.
+ */
 public interface ITxGenerator extends IWaveform {
 
+	/**
+	 * Gets the stream.
+	 *
+	 * @return the stream
+	 */
 	public IWaveform getStream();
 
 }
diff --git a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxRelation.java b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxRelation.java
index 40eafe1..f994357 100644
--- a/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxRelation.java
+++ b/plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxRelation.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2015 MINRES Technologies GmbH and others.
+ * Copyright (c) 2015 - 2020 MINRES Technologies GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -12,11 +12,29 @@ package com.minres.scviewer.database.tx;
 
 import com.minres.scviewer.database.RelationType;
 
+/**
+ * The Interface ITxRelation.
+ */
 public interface ITxRelation {
 
+	/**
+	 * Gets the relation type.
+	 *
+	 * @return the relation type
+	 */
 	RelationType getRelationType();
-	
+
+	/**
+	 * Gets the source.
+	 *
+	 * @return the source
+	 */
 	ITx getSource();
-	
+
+	/**
+	 * Gets the target.
+	 *
+	 * @return the target
+	 */
 	ITx getTarget();
 }