static int innerMain(final Configuration c, final String[] args) throws Exception {
    return ToolRunner.run(c, new WALPerformanceEvaluation(), args);
  }
The guts of the {@link #main} method. Call this method to avoid the {@link #main(String[])}
System.exit.
hbase-diagnostics/src/main/java/org/apache/hadoop/hbase/wal/WALPerformanceEvaluation.java