--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/io/FileNotFoundException.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 1994, 2008, 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.io;
+
+
+/**
+ * Signals that an attempt to open the file denoted by a specified pathname
+ * has failed.
+ *
+ * <p> This exception will be thrown by the {@link FileInputStream}, {@link
+ * FileOutputStream}, and {@link RandomAccessFile} constructors when a file
+ * with the specified pathname does not exist.  It will also be thrown by these
+ * constructors if the file does exist but for some reason is inaccessible, for
+ * example when an attempt is made to open a read-only file for writing.
+ *
+ * @author  unascribed
+ * @since   1.0
+ */
+
+public class FileNotFoundException extends IOException {
+    private static final long serialVersionUID = -897856973823710492L;
+
+    /**
+     * Constructs a <code>FileNotFoundException</code> with
+     * <code>null</code> as its error detail message.
+     */
+    public FileNotFoundException() {
+        super();
+    }
+
+    /**
+     * Constructs a <code>FileNotFoundException</code> with the
+     * specified detail message. The string <code>s</code> can be
+     * retrieved later by the
+     * <code>{@link java.lang.Throwable#getMessage}</code>
+     * method of class <code>java.lang.Throwable</code>.
+     *
+     * @param   s   the detail message.
+     */
+    public FileNotFoundException(String s) {
+        super(s);
+    }
+
+    /**
+     * Constructs a <code>FileNotFoundException</code> with a detail message
+     * consisting of the given pathname string followed by the given reason
+     * string.  If the <code>reason</code> argument is <code>null</code> then
+     * it will be omitted.  This private constructor is invoked only by native
+     * I/O methods.
+     *
+     * @since 1.2
+     */
+    private FileNotFoundException(String path, String reason) {
+        super(path + ((reason == null)
+                      ? ""
+                      : " (" + reason + ")"));
+    }
+
+}