@Override
    public FSDataOutputStream create(Path path, FsPermission fsPermission,
                                     boolean overwrite, int bufferSize,
                                     short replication, long blockSize,
                                     Progressable progressable
                                     ) throws IOException {
      statistics.incrementWriteOps(1);
      checkAccess();
      MockFile file = findFile(path);
      if (file == null) {
        file = new MockFile(path.toString(), (int) blockSize, new byte[0]);
        files.add(file);
      }
      return new MockOutputStream(file);
    }
WARNING: detele(Path...) don't actually delete
ql/src/test/org/apache/hadoop/hive/ql/io/orc/TestInputOutputFormat.java