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diff --git a/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/filters/NoPackageContainingFoldersFilter.java b/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/filters/NoPackageContainingFoldersFilter.java
new file mode 100644
index 00000000..f007c869
--- /dev/null
+++ b/case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/filters/NoPackageContainingFoldersFilter.java
@@ -0,0 +1,58 @@
+/*******************************************************************************
+ * 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.ui.filters;
+
+import org.eclipse.core.runtime.CoreException;
+
+import org.eclipse.core.resources.IFolder;
+import org.eclipse.core.resources.IResource;
+
+import org.eclipse.jface.viewers.Viewer;
+import org.eclipse.jface.viewers.ViewerFilter;
+
+import org.eclipse.jdt.core.IJavaElement;
+import org.eclipse.jdt.core.IPackageFragment;
+import org.eclipse.jdt.core.JavaCore;
+
+public class NoPackageContainingFoldersFilter extends ViewerFilter {
+
+	/*
+	 * @see ViewerFilter
+	 */
+	@Override
+	public boolean select(Viewer viewer, Object parent, Object element) {
+		if (element instanceof IFolder) {
+			try {
+				if (containsPackage((IFolder)element))
+					return true;
+				else
+					return false;
+			} catch (CoreException e) {
+				return true;
+			}
+		}
+
+		return true;
+	}
+
+	private boolean containsPackage(IFolder folder) throws CoreException {
+		IJavaElement element= JavaCore.create(folder);
+		if (element instanceof IPackageFragment)
+			return true;
+		IResource[] resources= folder.members();
+		for (int i= 0; i < resources.length; i++) {
+			if (resources[i] instanceof IFolder && containsPackage((IFolder)resources[i]))
+				return true;
+		}
+		return false;
+	}
+
+}