code: public OutputStream create(String src,
                               boolean overwrite,
                               short replication,
                               long blockSize
                               ) throws IOException {
      return create(src, overwrite, replication, blockSize, null);
    }
docs: Create a new dfs file with the specified block replication
  and return an output stream for writing into the file.
  
  @param src stream name
  @param overwrite do not check for file existence if true
  @param replication block replication
  @return output stream
  @throws IOException