diff --git a/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/editor/DiagramEditorBase.java b/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/editor/DiagramEditorBase.java
index d59349dd1a53cd593268410fedace48f89e656e9..fc5b6c7812b6c11795777f92ec47a4ed09781c0c 100644
--- a/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/editor/DiagramEditorBase.java
+++ b/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/editor/DiagramEditorBase.java
@@ -99,7 +99,7 @@ import org.fortiss.tooling.kernel.ui.util.EObjectSelectionUtils;
  * @author hoelzl
  * @author $Author$
  * @version $Rev$
- * @ConQAT.Rating RED Hash: 1AF213EC6831AB5F151B961002C7183D
+ * @ConQAT.Rating YELLOW Hash: 7B15AF8EF35DA949FB4FCC3345C5988B
  */
 public class DiagramEditorBase<T extends EObject> extends GEFEditorBase<T>
 		implements IPostSelectionProvider, ContextMenuContextProvider {
@@ -373,10 +373,6 @@ public class DiagramEditorBase<T extends EObject> extends GEFEditorBase<T>
 	 */
 	protected void registerEditActions() {
 		registerSelectionAction(new DeleteAction((IWorkbenchPart) this));
-		// TODO (FH): add copy paste actions for GEF
-		// registerSelectionAction(new CopyModelElementsAction());
-		// registerSelectionAction(new CutModelElementsAction());
-		// registerSelectionAction(new PasteModelElementAction());
 	}
 
 	/** Registers and returns the id of the given selection action */
diff --git a/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/editor/TreeViewerEditorBase.java b/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/editor/TreeViewerEditorBase.java
deleted file mode 100644
index 7e2baac7035842e031d0b997ba0c75041a594df8..0000000000000000000000000000000000000000
--- a/org.fortiss.tooling.base.ui/trunk/src/org/fortiss/tooling/base/ui/editor/TreeViewerEditorBase.java
+++ /dev/null
@@ -1,130 +0,0 @@
-/*--------------------------------------------------------------------------+
-$Id$
-|                                                                          |
-| Copyright 2011 ForTISS GmbH                                              |
-|                                                                          |
-| Licensed under the Apache License, Version 2.0 (the "License");          |
-| you may not use this file except in compliance with the License.         |
-| You may obtain a copy of the License at                                  |
-|                                                                          |
-|    http://www.apache.org/licenses/LICENSE-2.0                            |
-|                                                                          |
-| Unless required by applicable law or agreed to in writing, software      |
-| distributed under the License is distributed on an "AS IS" BASIS,        |
-| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
-| See the License for the specific language governing permissions and      |
-| limitations under the License.                                           |
-+--------------------------------------------------------------------------*/
-package org.fortiss.tooling.base.ui.editor;
-
-import java.util.Collection;
-import java.util.List;
-
-import org.eclipse.emf.common.notify.Adapter;
-import org.eclipse.emf.common.notify.Notification;
-import org.eclipse.emf.ecore.EObject;
-import org.eclipse.emf.ecore.util.EContentAdapter;
-import org.eclipse.jface.action.IMenuListener;
-import org.eclipse.jface.action.IMenuManager;
-import org.eclipse.jface.action.MenuManager;
-import org.eclipse.jface.viewers.TreeViewer;
-import org.eclipse.swt.widgets.Composite;
-import org.eclipse.swt.widgets.Menu;
-import org.fortiss.tooling.base.ui.dnd.jface.ViewerElementCompositionDropAdapter;
-import org.fortiss.tooling.kernel.ui.extension.base.EditorBase;
-import org.fortiss.tooling.kernel.ui.util.EObjectSelectionUtils;
-
-/**
- * An editor which only consists of a tree viewer. It uses {@link TreeViewer},
- * which also allows to define columns, i.e., use the tree and table at the same
- * time.
- * 
- * @author hoelzl
- * @author $Author$
- * @version $Rev$
- * @ConQAT.Rating RED Hash: 075530364F7D00ECA0A780DCE4F64D3C
- */
-public abstract class TreeViewerEditorBase<T extends EObject> extends
-		EditorBase<T> {
-
-	/** Stores the {@link TreeViewer}. */
-	private TreeViewer treeViewer;
-
-	/** The adapter used for dealing with changes of the */
-	private final Adapter editedObjectChanged = new EContentAdapter() {
-		@Override
-		public void notifyChanged(Notification notification) {
-			super.notifyChanged(notification);
-			if (notification.getEventType() != Notification.REMOVING_ADAPTER
-					&& !treeViewer.getTree().isDisposed()) {
-				treeViewer.refresh(true);
-			}
-		}
-	};
-
-	/** {@inheritDoc} */
-	@Override
-	public void createPartControl(Composite parent) {
-		treeViewer = new TreeViewer(parent);
-
-		setupTreeViewer(treeViewer);
-
-		ViewerElementCompositionDropAdapter dndAdapter = new ViewerElementCompositionDropAdapter(
-				treeViewer);
-		treeViewer.addDropSupport(dndAdapter.getSupportedDNDOperations(),
-				dndAdapter.getPreferredTransfers(), dndAdapter);
-
-		treeViewer.setInput(editedObject);
-		getEditorSite().setSelectionProvider(treeViewer);
-
-		editedObject.eAdapters().add(editedObjectChanged);
-
-		initContextMenu();
-	}
-
-	/**
-	 * Initializes context menu support.
-	 */
-	protected void initContextMenu() {
-		MenuManager menuManager = new MenuManager("#PopupMenu");
-		menuManager.setRemoveAllWhenShown(true);
-		menuManager.addMenuListener(new IMenuListener() {
-			@Override
-			public void menuAboutToShow(IMenuManager manager) {
-				// TODO: add context menu support
-			}
-		});
-		Menu menu = menuManager.createContextMenu(treeViewer.getTree());
-		treeViewer.getTree().setMenu(menu);
-		getSite().registerContextMenu(menuManager, treeViewer);
-	}
-
-	/** {@inheritDoc} */
-	@Override
-	public void dispose() {
-		editedObject.eAdapters().remove(editedObjectChanged);
-		super.dispose();
-	}
-
-	/** Returns the elements currently selected in the tree. */
-	protected Collection<EObject> getTreeSelection() {
-		List<EObject> result = EObjectSelectionUtils
-				.getEObjectElements(treeViewer.getSelection());
-		if (result.isEmpty()) {
-			result.add(editedObject);
-		}
-		return result;
-	}
-
-	/**
-	 * This method is used to configure the tree viewer, e.g. set the content
-	 * provider, and the label provider.
-	 */
-	protected abstract void setupTreeViewer(TreeViewer treeViewer);
-
-	/** {@inheritDoc} */
-	@Override
-	public void setFocus() {
-		treeViewer.getTree().setFocus();
-	}
-}