code: @Override
    public void sinkConfInit(FlowProcess<? extends Configuration> flowProcess,
        Tap<Configuration, RecordReader, OutputCollector> tap, Configuration conf) {
      conf.setBoolean("mapred.mapper.new-api", false);
      conf.setClass("mapred.output.format.class", CorcOutputFormat.class, OutputFormat.class);
      conf.setClass("mapreduce.job.output.key.class", NullWritable.class, Writable.class);
      conf.setClass("mapreduce.job.output.value.class", Corc.class, Writable.class);
    }
docs: Sets the {@link OutputFormat} to {@link CorcOutputFormat}, sets the key and values to {@link NullWritable} and
  {@link Corc} respectively.