Index: src/org/eclipse/gmf/runtime/diagram/ui/resources/editor/document/EditorInputProxy.java
===================================================================
RCS file: /cvsroot/technology/org.eclipse.gmf/plugins/org.eclipse.gmf.runtime.diagram.ui.resources.editor/src/org/eclipse/gmf/runtime/diagram/ui/resources/editor/document/EditorInputProxy.java,v
retrieving revision 1.2
diff -u -r1.2 EditorInputProxy.java
--- src/org/eclipse/gmf/runtime/diagram/ui/resources/editor/document/EditorInputProxy.java	12 Sep 2005 21:26:19 -0000	1.2
+++ src/org/eclipse/gmf/runtime/diagram/ui/resources/editor/document/EditorInputProxy.java	13 Dec 2005 20:56:12 -0000
@@ -26,8 +26,8 @@
 public class EditorInputProxy
 	implements IEditorInput, MEditingDomainElement {
 
-	IEditorInput fProxied = null;
-	MEditingDomain editingDomain = null;
+	protected IEditorInput fProxied = null;
+	protected MEditingDomain editingDomain = null;
 	
 	/**
 	 * @param input IEditorInput
Index: src/org/eclipse/gmf/runtime/diagram/ui/resources/editor/internal/parts/DiagramDocumentEditor.java
===================================================================
RCS file: /cvsroot/technology/org.eclipse.gmf/plugins/org.eclipse.gmf.runtime.diagram.ui.resources.editor/src/org/eclipse/gmf/runtime/diagram/ui/resources/editor/internal/parts/DiagramDocumentEditor.java,v
retrieving revision 1.7
diff -u -r1.7 DiagramDocumentEditor.java
--- src/org/eclipse/gmf/runtime/diagram/ui/resources/editor/internal/parts/DiagramDocumentEditor.java	25 Nov 2005 19:37:53 -0000	1.7
+++ src/org/eclipse/gmf/runtime/diagram/ui/resources/editor/internal/parts/DiagramDocumentEditor.java	13 Dec 2005 20:56:12 -0000
@@ -325,6 +325,24 @@
 	}
 
 	/**
+	 * Hook method for setting the document provider for the given input.
+	 * This default implementation does nothing. Clients may
+	 * reimplement.
+	 *
+	 * @param input the input of this editor.
+	 * @since 3.0
+	 */
+	protected IDocumentProvider getDocumentProvider(IEditorInput input) {
+		IDocumentProvider provider = DocumentProviderRegistry.getDefault().getDocumentProvider(input, new IDocumentProviderSelector() {
+			public boolean select(String documentType) {
+				// Only checking of the interface name
+				return documentType.equals(IDiagramDocument.class.getName());
+			}
+		});
+		return provider;
+	}
+
+	/**
 	 * If there is no explicit document provider set, the implicit one is
 	 * re-initialized based on the given editor input.
 	 *