separate RelationTypeFactory from RelationType

plugins/com.minres.scviewer.database/pom.xml

@@ -8,5 +8,4 @@
 	<relativePath>../..</relativePath>
   </parent>
   <packaging>eclipse-plugin</packaging>
-  <version>2.0.0-SNAPSHOT</version>
 </project>

plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/RelationType.java

@@ -11,31 +11,16 @@
 package com.minres.scviewer.database;
 
 import java.io.Serializable;
-import java.util.HashMap;
 
 public class RelationType implements Serializable {
-	
 	/**
 	 * 
 	 */
 	private static final long serialVersionUID = 6394859077558971735L;
 
-	private static HashMap<String, RelationType> registry = new HashMap<>();
-	
 	private String name;
 
-	public static RelationType create(String name){
-		if(registry.containsKey(name)){
-			return registry.get(name);
-		}else{
-			RelationType relType = new RelationType(name);
-			registry.put(name, relType);
-			return relType;
-		}
-		
-	}
-	
-	private RelationType(String name) {
+	RelationType(String name) {
 		super();
 		this.name = name;
 	}
@@ -59,6 +44,9 @@ public class RelationType implements Serializable {
 	
 	@Override
 	public boolean equals(Object obj) {
-		return name.equals(obj);
+		if(obj instanceof RelationType)
+			return name.equals(((RelationType)obj).name);
+		else
+			return false;
 	}
 }

plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/RelationTypeFactory.java

@@ -0,0 +1,22 @@
+package com.minres.scviewer.database;
+
+import java.util.HashMap;
+
+public class RelationTypeFactory {
+	
+	public static RelationType create(String name){
+		if(registry.containsKey(name)){
+			return registry.get(name);
+		}else{
+			RelationType relType = new RelationType(name);
+			registry.put(name, relType);
+			return relType;
+		}
+		
+	}
+
+	private RelationTypeFactory() {}
+	
+	private static HashMap<String, RelationType> registry = new HashMap<>();
+
+}

plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/internal/WaveformDb.java

@@ -11,7 +11,6 @@
 package com.minres.scviewer.database.internal;
 
 import java.io.File;
-import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;

plugins/com.minres.scviewer.database/src/com/minres/scviewer/database/tx/ITxAttributeType.java

@@ -10,8 +10,6 @@
  *******************************************************************************/
 package com.minres.scviewer.database.tx;
 
-import java.io.Serializable;
-
 import com.minres.scviewer.database.AssociationType;
 import com.minres.scviewer.database.DataType;