docs: public static Configuration createConfiguration(File configurationDirectory) {
  	Configuration hadoopConfiguration = new Configuration();
  	hadoopConfiguration
  		.addResource(new Path(new File(configurationDirectory, "etc/hadoop/core-site.xml").toString()));
  	hadoopConfiguration
  		.addResource(new Path(new File(configurationDirectory, "etc/hadoop/hdfs-site.xml").toString()));
  	hadoopConfiguration
  		.addResource(new Path(new File(configurationDirectory, "etc/hadoop/mapred-site.xml").toString()));
  	return hadoopConfiguration;
  
      }