class that have only private constructors should be final

org.eclipse.titanium/src/org/eclipse/titanium/error/ErrorMessage.java

@@ -20,7 +20,7 @@ import org.eclipse.ui.dialogs.PreferencesUtil;
  * @author Gabor
  * 
  */
-public class ErrorMessage {
+public final class ErrorMessage {
 	
 	public static final String LOG_ENTRY_NOTE = " (see error log for further information)";
 	

org.eclipse.titanium/src/org/eclipse/titanium/graph/clustering/ClusteringTools.java

@@ -32,7 +32,7 @@ import edu.uci.ics.jung.graph.DirectedSparseGraph;
  * 
  * @author Gobor Daniel
  */
-public class ClusteringTools {
+public final class ClusteringTools {
 
 	private static List<String> prefixes = createPrefix();
 	

org.eclipse.titanium/src/org/eclipse/titanium/graph/components/NodeColours.java

@@ -15,7 +15,7 @@ import java.awt.Color;
  * 
  * @author Gabor Jenei
  */
-public class NodeColours {
+public final class NodeColours {
 	public static final Color LIGHT_GREEN = new Color(137, 186, 23);
 	public static final Color DARK_GREEN = new Color(0, 123, 120);
 	public static final Color LIGHT_YELLOW = new Color(250, 187, 0);

org.eclipse.titanium/src/org/eclipse/titanium/graph/gui/common/Layouts.java

@@ -17,7 +17,7 @@ import org.eclipse.titanium.graph.gui.utils.LayoutEntry;
  * 
  * @author Gabor Jenei
  */
-public class Layouts {
+public final class Layouts {
 
 	/**
 	 * layout button for ISOM layout <b><font color="red">It must be used

org.eclipse.titanium/src/org/eclipse/titanium/markers/utils/AnalyzerCache.java

@@ -16,7 +16,7 @@ import org.eclipse.titanium.markers.types.CodeSmellType;
 import org.eclipse.titanium.preferences.ProblemTypePreference;
 import org.eclipse.titanium.preferences.pages.MarkersPreferencePage;
 
-public class AnalyzerCache {
+public final class AnalyzerCache {
 	/**
 	 * Private constructor.
 	 * */

org.eclipse.titanium/src/org/eclipse/titanium/utils/LocationHighlighter.java

@@ -21,7 +21,7 @@ import org.eclipse.ui.texteditor.AbstractTextEditor;
 /**
  * Helper class: helps in converting a location object into an open editor, where the location is highlighted. 
  **/
-public class LocationHighlighter {
+public final class LocationHighlighter {
 
 	private LocationHighlighter() {
 		//private constructor to disable instantiation