diff -r 000000000000 -r 959103a6100f src/share/classes/com/sun/tools/javac/api/Messages.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/classes/com/sun/tools/javac/api/Messages.java	Wed Apr 27 01:34:52 2016 +0800
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2008, 2009, 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 com.sun.tools.javac.api;
+
+import java.util.Locale;
+import java.util.MissingResourceException;
+
+/**
+ * This interface defines the minimum requirements in order to provide support
+ * for localized formatted strings.
+ *
+ * <p><b>This is NOT part of any supported API.
+ * If you write code that depends on this, you do so at your own risk.
+ * This code and its internal interfaces are subject to change or
+ * deletion without notice.</b>
+ *
+ * @author Maurizio Cimadamore
+ */
+public interface Messages {
+
+    /**
+     * Add a new resource bundle to the list that is searched for localized messages.
+     * @param bundleName the name to identify the resource bundle of localized messages.
+     * @throws MissingResourceException if the given resource is not found
+     */
+    void add(String bundleName) throws MissingResourceException;
+
+    /**
+     * Get a localized formatted string.
+     * @param l locale in which the text is to be localized
+     * @param key locale-independent message key
+     * @param args misc message arguments
+     * @return a localized formatted string
+     */
+    String getLocalizedString(Locale l, String key, Object... args);
+}