Implement FilterReader

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

classpath/java/io/FilterReader.java

@@ -0,0 +1,51 @@
+/* Copyright (c) 2008-2013, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
+package java.io;
+
+public abstract class FilterReader extends Reader {
+  protected Reader in;
+
+  protected FilterReader(Reader in) {
+    this.in = in;
+  }
+
+  public int read() throws IOException {
+    return in.read();
+  }
+
+  public int read(char[] buffer, int offset, int length) throws IOException {
+    return in.read(buffer, offset, length);
+  }
+
+  public boolean ready() throws IOException {
+    throw new UnsupportedOperationException();
+  }
+
+  public long skip(long n) throws IOException {
+    throw new UnsupportedOperationException();
+  }
+
+  public void close() throws IOException {
+    in.close();
+  }
+
+  public boolean markSupported() {
+    return in.markSupported();
+  }
+
+  public void mark(int readAheadLimit) throws IOException {
+    in.mark(readAheadLimit);
+  }
+
+  public void reset() throws IOException {
+   in.reset();
+  }
+}