@TearDown(Level.Invocation)
  public void cleanUpInvocation() throws IOException {
    recordWriter.close(false);
    recordReader.close();

    recordWriterFile.delete();
    writeFile.delete();
  }
This method is invoked after every call to the methods to test. It closes
and cleans up all temporary files.

@throws IOException If it cannot close or delete temporary files.
itests/hive-jmh/src/main/java/org/apache/hive/benchmark/storage/ColumnarStorageBench.java