--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/io/FilterReader.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 1996, 2005, 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;
+
+
+/**
+ * Abstract class for reading filtered character streams.
+ * The abstract class <code>FilterReader</code> itself
+ * provides default methods that pass all requests to
+ * the contained stream. Subclasses of <code>FilterReader</code>
+ * should override some of these methods and may also provide
+ * additional methods and fields.
+ *
+ * @author      Mark Reinhold
+ * @since       1.1
+ */
+
+public abstract class FilterReader extends Reader {
+
+    /**
+     * The underlying character-input stream.
+     */
+    protected Reader in;
+
+    /**
+     * Creates a new filtered reader.
+     *
+     * @param in  a Reader object providing the underlying stream.
+     * @throws NullPointerException if <code>in</code> is <code>null</code>
+     */
+    protected FilterReader(Reader in) {
+        super(in);
+        this.in = in;
+    }
+
+    /**
+     * Reads a single character.
+     *
+     * @exception  IOException  If an I/O error occurs
+     */
+    public int read() throws IOException {
+        return in.read();
+    }
+
+    /**
+     * Reads characters into a portion of an array.
+     *
+     * @exception  IOException  If an I/O error occurs
+     * @exception  IndexOutOfBoundsException {@inheritDoc}
+     */
+    public int read(char cbuf[], int off, int len) throws IOException {
+        return in.read(cbuf, off, len);
+    }
+
+    /**
+     * Skips characters.
+     *
+     * @exception  IOException  If an I/O error occurs
+     */
+    public long skip(long n) throws IOException {
+        return in.skip(n);
+    }
+
+    /**
+     * Tells whether this stream is ready to be read.
+     *
+     * @exception  IOException  If an I/O error occurs
+     */
+    public boolean ready() throws IOException {
+        return in.ready();
+    }
+
+    /**
+     * Tells whether this stream supports the mark() operation.
+     */
+    public boolean markSupported() {
+        return in.markSupported();
+    }
+
+    /**
+     * Marks the present position in the stream.
+     *
+     * @exception  IOException  If an I/O error occurs
+     */
+    public void mark(int readAheadLimit) throws IOException {
+        in.mark(readAheadLimit);
+    }
+
+    /**
+     * Resets the stream.
+     *
+     * @exception  IOException  If an I/O error occurs
+     */
+    public void reset() throws IOException {
+        in.reset();
+    }
+
+    public void close() throws IOException {
+        in.close();
+    }
+
+}