--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.compiler/share/classes/javax/tools/ForwardingFileObject.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2006, 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.tools;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.Reader;
+import java.io.Writer;
+import java.net.URI;
+import java.util.Objects;
+
+/**
+ * Forwards calls to a given file object.  Subclasses of this class
+ * might override some of these methods and might also provide
+ * additional fields and methods.
+ *
+ * @param <F> the kind of file object forwarded to by this object
+ * @author Peter von der Ah&eacute;
+ * @since 1.6
+ */
+public class ForwardingFileObject<F extends FileObject> implements FileObject {
+
+    /**
+     * The file object which all methods are delegated to.
+     */
+    protected final F fileObject;
+
+    /**
+     * Creates a new instance of ForwardingFileObject.
+     * @param fileObject delegate to this file object
+     */
+    protected ForwardingFileObject(F fileObject) {
+        this.fileObject = Objects.requireNonNull(fileObject);
+    }
+
+    public URI toUri() {
+        return fileObject.toUri();
+    }
+
+    public String getName() {
+        return fileObject.getName();
+    }
+
+    /**
+     * @throws IllegalStateException {@inheritDoc}
+     * @throws UnsupportedOperationException {@inheritDoc}
+     * @throws IOException {@inheritDoc}
+     */
+    public InputStream openInputStream() throws IOException {
+        return fileObject.openInputStream();
+    }
+
+    /**
+     * @throws IllegalStateException {@inheritDoc}
+     * @throws UnsupportedOperationException {@inheritDoc}
+     * @throws IOException {@inheritDoc}
+     */
+    public OutputStream openOutputStream() throws IOException {
+        return fileObject.openOutputStream();
+    }
+
+    /**
+     * @throws IllegalStateException {@inheritDoc}
+     * @throws UnsupportedOperationException {@inheritDoc}
+     * @throws IOException {@inheritDoc}
+     */
+    public Reader openReader(boolean ignoreEncodingErrors) throws IOException {
+        return fileObject.openReader(ignoreEncodingErrors);
+    }
+
+    /**
+     * @throws IllegalStateException {@inheritDoc}
+     * @throws UnsupportedOperationException {@inheritDoc}
+     * @throws IOException {@inheritDoc}
+     */
+    public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
+        return fileObject.getCharContent(ignoreEncodingErrors);
+    }
+
+    /**
+     * @throws IllegalStateException {@inheritDoc}
+     * @throws UnsupportedOperationException {@inheritDoc}
+     * @throws IOException {@inheritDoc}
+     */
+    public Writer openWriter() throws IOException {
+        return fileObject.openWriter();
+    }
+
+    public long getLastModified() {
+        return fileObject.getLastModified();
+    }
+
+    public boolean delete() {
+        return fileObject.delete();
+    }
+}