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diff --git a/bundles/org.eclipse.compare/compare/org/eclipse/compare/structuremergeviewer/SharedDocumentAdapterWrapper.java b/bundles/org.eclipse.compare/compare/org/eclipse/compare/structuremergeviewer/SharedDocumentAdapterWrapper.java
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+/*******************************************************************************
+ * Copyright (c) 2006, 2007 IBM Corporation 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:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.compare.structuremergeviewer;
+
+import org.eclipse.compare.ISharedDocumentAdapter;
+import org.eclipse.compare.SharedDocumentAdapter;
+import org.eclipse.compare.internal.Utilities;
+import org.eclipse.core.runtime.*;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.ui.IEditorInput;
+import org.eclipse.ui.texteditor.IDocumentProvider;
+
+/**
+ * An implementation of {@link ISharedDocumentAdapter} that wraps another
+ * shared document adapter.
+ * <p>
+ * Clients may subclass this class.
+ * </p>
+ * @since 3.3
+ */
+public class SharedDocumentAdapterWrapper implements ISharedDocumentAdapter {
+
+	private ISharedDocumentAdapter wrappedAdapter;
+	
+	/**
+	 * Helper method that returns the shared document adapter for the
+	 * given typed element or <code>null</code> if there isn't one.
+	 * @param element the typed element
+	 * @return the shared document adapter for the given typed element 
+	 *    or <code>null</code>
+	 */
+	public static ISharedDocumentAdapter getAdapter(Object element) {
+		return (ISharedDocumentAdapter)Utilities.getAdapter(element, ISharedDocumentAdapter.class, true);
+	}
+	
+	/**
+	 * Create a shared document adapter that wraps the given adapter.
+	 * @param wrappedAdapter the wrapped adapter
+	 */
+	public SharedDocumentAdapterWrapper(ISharedDocumentAdapter wrappedAdapter) {
+		super();
+		this.wrappedAdapter = wrappedAdapter;
+	}
+	
+	/* (non-Javadoc)
+	 * @see org.eclipse.compare.ISharedDocumentAdapter#connect(org.eclipse.ui.texteditor.IDocumentProvider, org.eclipse.ui.IEditorInput)
+	 */
+	public void connect(IDocumentProvider provider, IEditorInput documentKey)
+			throws CoreException {
+		wrappedAdapter.connect(provider, documentKey);
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.compare.ISharedDocumentAdapter#disconnect(org.eclipse.ui.texteditor.IDocumentProvider, org.eclipse.ui.IEditorInput)
+	 */
+	public void disconnect(IDocumentProvider provider, IEditorInput documentKey) {
+		wrappedAdapter.disconnect(provider, documentKey);
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.compare.ISharedDocumentAdapter#getDocumentKey(java.lang.Object)
+	 */
+	public IEditorInput getDocumentKey(Object element) {
+		return wrappedAdapter.getDocumentKey(element);
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.compare.ISharedDocumentAdapter#saveDocument(org.eclipse.ui.texteditor.IDocumentProvider, org.eclipse.ui.IEditorInput, org.eclipse.jface.text.IDocument, boolean, org.eclipse.core.runtime.IProgressMonitor)
+	 */
+	public void flushDocument(IDocumentProvider provider,
+			IEditorInput documentKey, IDocument document, boolean overwrite) throws CoreException {
+		wrappedAdapter.flushDocument(provider, documentKey, document, overwrite);
+	}
+
+	/**
+	 * Return the wrapped adapter.
+	 * @return the wrapped adapter
+	 */
+	public final ISharedDocumentAdapter getWrappedAdapter() {
+		return wrappedAdapter;
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.compare.ISharedDocumentAdapter#disconnect(java.lang.Object)
+	 */
+	public void disconnect(Object element) {
+		IEditorInput input = getDocumentKey(element);
+		if (input == null)
+			return;
+		IDocumentProvider provider = SharedDocumentAdapter.getDocumentProvider(input);
+		if (provider == null)
+			return;
+		disconnect(provider, input);
+	}
+
+}