--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/nio/file/FileSystemException.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,125 @@
+/*
+ * 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;
+
+import java.io.IOException;
+
+/**
+ * Thrown when a file system operation fails on one or two files. This class is
+ * the general class for file system exceptions.
+ *
+ * @since 1.7
+ */
+
+public class FileSystemException
+    extends IOException
+{
+    static final long serialVersionUID = -3055425747967319812L;
+
+    private final String file;
+    private final String other;
+
+    /**
+     * Constructs an instance of this class. This constructor should be used
+     * when an operation involving one file fails and there isn't any additional
+     * information to explain the reason.
+     *
+     * @param   file
+     *          a string identifying the file or {@code null} if not known.
+     */
+    public FileSystemException(String file) {
+        super((String)null);
+        this.file = file;
+        this.other = null;
+    }
+
+    /**
+     * Constructs an instance of this class. This constructor should be used
+     * when an operation involving two files fails, or there is additional
+     * information to explain the reason.
+     *
+     * @param   file
+     *          a string identifying the file or {@code null} if not known.
+     * @param   other
+     *          a string identifying the other file or {@code null} if there
+     *          isn't another file or if not known
+     * @param   reason
+     *          a reason message with additional information or {@code null}
+     */
+    public FileSystemException(String file, String other, String reason) {
+        super(reason);
+        this.file = file;
+        this.other = other;
+    }
+
+    /**
+     * Returns the file used to create this exception.
+     *
+     * @return  the file (can be {@code null})
+     */
+    public String getFile() {
+        return file;
+    }
+
+    /**
+     * Returns the other file used to create this exception.
+     *
+     * @return  the other file (can be {@code null})
+     */
+    public String getOtherFile() {
+        return other;
+    }
+
+    /**
+     * Returns the string explaining why the file system operation failed.
+     *
+     * @return  the string explaining why the file system operation failed
+     */
+    public String getReason() {
+        return super.getMessage();
+    }
+
+    /**
+     * Returns the detail message string.
+     */
+    @Override
+    public String getMessage() {
+        if (file == null && other == null)
+            return getReason();
+        StringBuilder sb = new StringBuilder();
+        if (file != null)
+            sb.append(file);
+        if (other != null) {
+            sb.append(" -> ");
+            sb.append(other);
+        }
+        if (getReason() != null) {
+            sb.append(": ");
+            sb.append(getReason());
+        }
+        return sb.toString();
+    }
+}