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diff --git a/case-study/jdt-before/core refactoring/org/eclipse/jdt/internal/corext/refactoring/changes/CompilationUnitReorgChange.java b/case-study/jdt-before/core refactoring/org/eclipse/jdt/internal/corext/refactoring/changes/CompilationUnitReorgChange.java
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+++ b/case-study/jdt-before/core refactoring/org/eclipse/jdt/internal/corext/refactoring/changes/CompilationUnitReorgChange.java	
@@ -0,0 +1,121 @@
+/*******************************************************************************
+ * 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
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.internal.corext.refactoring.changes;
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.OperationCanceledException;
+import org.eclipse.core.runtime.SubProgressMonitor;
+
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.resources.mapping.ResourceMapping;
+
+import org.eclipse.ltk.core.refactoring.Change;
+import org.eclipse.ltk.core.refactoring.participants.ReorgExecutionLog;
+import org.eclipse.ltk.core.refactoring.resource.ResourceChange;
+
+import org.eclipse.jdt.core.ICompilationUnit;
+import org.eclipse.jdt.core.IPackageFragment;
+import org.eclipse.jdt.core.JavaCore;
+
+import org.eclipse.jdt.internal.corext.refactoring.reorg.INewNameQuery;
+import org.eclipse.jdt.internal.corext.util.JavaElementResourceMapping;
+
+import org.eclipse.jdt.ui.JavaElementLabels;
+
+abstract class CompilationUnitReorgChange extends ResourceChange {
+
+	private String fCuHandle;
+	private String fOldPackageHandle;
+	private String fNewPackageHandle;
+
+	private INewNameQuery fNewNameQuery;
+
+	CompilationUnitReorgChange(ICompilationUnit cu, IPackageFragment dest, INewNameQuery newNameQuery) {
+		fCuHandle= cu.getHandleIdentifier();
+		fNewPackageHandle= dest.getHandleIdentifier();
+		fNewNameQuery= newNameQuery;
+		fOldPackageHandle= cu.getParent().getHandleIdentifier();
+	}
+
+	CompilationUnitReorgChange(ICompilationUnit cu, IPackageFragment dest) {
+		this(cu, dest, null);
+	}
+
+	CompilationUnitReorgChange(String oldPackageHandle, String newPackageHandle, String cuHandle) {
+		fOldPackageHandle= oldPackageHandle;
+		fNewPackageHandle= newPackageHandle;
+		fCuHandle= cuHandle;
+	}
+
+	@Override
+	public final Change perform(IProgressMonitor pm) throws CoreException, OperationCanceledException {
+		pm.beginTask(getName(), 1);
+		try {
+			ICompilationUnit unit= getCu();
+			ResourceMapping mapping= JavaElementResourceMapping.create(unit);
+			Change result= doPerformReorg(new SubProgressMonitor(pm, 1));
+			markAsExecuted(unit, mapping);
+			return result;
+		} finally {
+			pm.done();
+		}
+	}
+
+	abstract Change doPerformReorg(IProgressMonitor pm) throws CoreException, OperationCanceledException;
+
+	@Override
+	public Object getModifiedElement() {
+		return getCu();
+	}
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.jdt.internal.corext.refactoring.base.JDTChange#getModifiedResource()
+	 */
+	@Override
+	protected IResource getModifiedResource() {
+		ICompilationUnit cu= getCu();
+		if (cu != null) {
+			return cu.getResource();
+		}
+		return null;
+	}
+
+	ICompilationUnit getCu() {
+		return (ICompilationUnit)JavaCore.create(fCuHandle);
+	}
+
+	IPackageFragment getOldPackage() {
+		return (IPackageFragment)JavaCore.create(fOldPackageHandle);
+	}
+
+	IPackageFragment getDestinationPackage() {
+		return (IPackageFragment)JavaCore.create(fNewPackageHandle);
+	}
+
+	String getNewName() throws OperationCanceledException {
+		if (fNewNameQuery == null)
+			return null;
+		return fNewNameQuery.getNewName();
+	}
+
+	static String getPackageName(IPackageFragment pack) {
+		return JavaElementLabels.getElementLabel(pack, JavaElementLabels.ALL_DEFAULT);
+	}
+
+	private void markAsExecuted(ICompilationUnit unit, ResourceMapping mapping) {
+		ReorgExecutionLog log= (ReorgExecutionLog)getAdapter(ReorgExecutionLog.class);
+		if (log != null) {
+			log.markAsProcessed(unit);
+			log.markAsProcessed(mapping);
+		}
+	}
+}