### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: model/org/eclipse/jdt/core/IClassFileWorkingCopy.java
===================================================================
RCS file: model/org/eclipse/jdt/core/IClassFileWorkingCopy.java
diff -N model/org/eclipse/jdt/core/IClassFileWorkingCopy.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ model/org/eclipse/jdt/core/IClassFileWorkingCopy.java	1 Jan 1970 00:00:00 -0000
@@ -0,0 +1,5 @@
+package org.eclipse.jdt.core;
+
+public interface IClassFileWorkingCopy {
+
+}
Index: model/org/eclipse/jdt/internal/core/ClassFileWorkingCopy.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/model/org/eclipse/jdt/internal/core/ClassFileWorkingCopy.java,v
retrieving revision 1.53
diff -u -r1.53 ClassFileWorkingCopy.java
--- model/org/eclipse/jdt/internal/core/ClassFileWorkingCopy.java	27 Jun 2008 16:03:51 -0000	1.53
+++ model/org/eclipse/jdt/internal/core/ClassFileWorkingCopy.java	14 Aug 2011 17:33:44 -0000
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2008 IBM Corporation and others.
+ * Copyright (c) 2000, 2011 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
@@ -14,6 +14,7 @@
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.jdt.core.IBuffer;
+import org.eclipse.jdt.core.IClassFileWorkingCopy;
 import org.eclipse.jdt.core.IJavaElement;
 import org.eclipse.jdt.core.IJavaModelStatusConstants;
 import org.eclipse.jdt.core.JavaModelException;
@@ -28,7 +29,7 @@
 /**
  * A working copy on an <code>IClassFile</code>.
  */
-public class ClassFileWorkingCopy extends CompilationUnit {
+public class ClassFileWorkingCopy extends CompilationUnit implements IClassFileWorkingCopy {
 
 	public ClassFile classFile;
 
#P org.eclipse.jdt.ui
Index: ui/org/eclipse/jdt/internal/ui/JavaPlugin.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/JavaPlugin.java,v
retrieving revision 1.227
diff -u -r1.227 JavaPlugin.java
--- ui/org/eclipse/jdt/internal/ui/JavaPlugin.java	1 Mar 2011 11:50:59 -0000	1.227
+++ ui/org/eclipse/jdt/internal/ui/JavaPlugin.java	14 Aug 2011 17:33:47 -0000
@@ -69,6 +69,7 @@
 import org.eclipse.ui.editors.text.templates.ContributionTemplateStore;
 
 import org.eclipse.jdt.core.IBuffer;
+import org.eclipse.jdt.core.IClassFileWorkingCopy;
 import org.eclipse.jdt.core.ICompilationUnit;
 import org.eclipse.jdt.core.JavaCore;
 import org.eclipse.jdt.core.WorkingCopyOwner;
@@ -363,9 +364,13 @@
 			@Override
 			public IBuffer createBuffer(ICompilationUnit workingCopy) {
 				ICompilationUnit original= workingCopy.getPrimary();
-				IResource resource= original.getResource();
-				if (resource instanceof IFile)
-					return new DocumentAdapter(workingCopy, (IFile) resource);
+				if (original instanceof IClassFileWorkingCopy) {
+					return super.createBuffer(workingCopy);
+				} else {
+					IResource resource= original.getResource();
+					if (resource instanceof IFile)
+						return new DocumentAdapter(workingCopy, (IFile) resource);
+				}
 				return DocumentAdapter.NULL;
 			}
 		});