--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.desktop/share/classes/javax/swing/UIClientPropertyKey.java	Sat Apr 16 23:36:45 2016 +0300
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2006, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package javax.swing;
+
+/**
+ * This interface is used only for tagging keys for client properties for
+ * {@code JComponent} set by UI which needs to be cleared on {@literal L&F}
+ * change and serialization.
+ * <p>
+ * All such keys are removed from client properties in
+ * {@code JComponent.setUI()} method after uninstalling old UI and before
+ * installing the new one. They are also removed prior to serialization.
+ *
+ * @author Igor Kushnirskiy
+ * @since 9
+ */
+public interface UIClientPropertyKey {
+}