diff -r 836adbf7a2cd -r 3317bb8137f4 jdk/src/java.base/share/classes/java/nio/file/FileSystemAlreadyExistsException.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/java/nio/file/FileSystemAlreadyExistsException.java	Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2007, 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 java.nio.file;
+
+/**
+ * Runtime exception thrown when an attempt is made to create a file system that
+ * already exists.
+ */
+
+public class FileSystemAlreadyExistsException
+    extends RuntimeException
+{
+    static final long serialVersionUID = -5438419127181131148L;
+
+    /**
+     * Constructs an instance of this class.
+     */
+    public FileSystemAlreadyExistsException() {
+    }
+
+    /**
+     * Constructs an instance of this class.
+     *
+     * @param   msg
+     *          the detail message
+     */
+    public FileSystemAlreadyExistsException(String msg) {
+        super(msg);
+    }
+}