title: FindBugs:" may fail to close stream ", how to solve it?
body: <p>The follow code is marked as erroneous by FindBugs.
  FindBugs says that <em>"This method may fail to clean up (close, dispose of) a stream, database object, or other resource requiring an explicit cleanup operation."</em>
  The error is marked on the line <code>output = new FileOutputStream (localFile);</code></p>
  
  <p>But we have already added try/finally to the block.</p>
  
  <pre><code>inputStream   input =null;
  OutputStream output =null;
  try {
      input = zipFile.getInputStream(entry);
      File localFile = new File(unzipFile.getAbsolutePath()
              + File.separator + entryName);
      output = new FileOutputStream (localFile);  // BUG MARKED HERE
      byte[] buffer = new byte[1024 * 8];
      int readLen = 0;
      while ((readLen = input.read(buffer, 0, 1024 * 8)) != -1) {
          output.write(buffer, 0, readLen);
      }
      output.flush();
      output.close();
      input.close();
  
  } finally {
      if(output!=null) {
          output.flush();
          output.close();
      }
      if(input!=null) {
          input.close();
      }
  }
  </code></pre>