http://xmlgraphics.apache.org/commons/: Apache XML Graphics Commons is a library that consists of several reusable components used by Apache Batik and Apache FOP. Many of these components can easily be used separately outside the domains of SVG and XSL-FO. (Apache Software Foundation) 
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* $Id: Finalizable.java 1732018 2016-02-24 04:51:06Z gadams $ */

package org.apache.xmlgraphics.util.io;


This interface is used for special FilteredOutputStream classes that won't
be closed (since this causes the target OutputStream to be closed, too) but
where flush() is not enough, for example because a final marker has to be
written to the target stream.

Version:  $Id: Finalizable.java 1732018 2016-02-24 04:51:06Z gadams $
/**
 * This interface is used for special FilteredOutputStream classes that won't
 * be closed (since this causes the target OutputStream to be closed, too) but
 * where flush() is not enough, for example because a final marker has to be
 * written to the target stream.
 *
 * @version   $Id: Finalizable.java 1732018 2016-02-24 04:51:06Z gadams $
 */
public interface Finalizable {

    
This method can be called instead of close() on a subclass of
FilteredOutputStream when a final marker has to be written to the target
stream, but close() cannot be called.

Throws:
  • IOException –  In case of an IO problem
/**
     * This method can be called instead of close() on a subclass of
     * FilteredOutputStream when a final marker has to be written to the target
     * stream, but close() cannot be called.
     *
     * @exception java.io.IOException  In case of an IO problem
     */
    void finalizeStream()
        throws java.io.IOException;

}