def METHOD_NAME(self, course_id, csv_dir):
    """
    Create CSV files for submission/assessment data in a directory.
    Args:
        course_id (unicode): The ID of the course to dump data from.
        csv_dir (unicode): The absolute path to the directory in which to create CSV files.
    Returns:
        None
    """
    output_streams = {
        name: open(os.path.join(csv_dir, rel_path), 'w')  # pylint: disable=consider-using-with
        for name, rel_path in self.OUTPUT_CSV_PATHS.items()
    }
    csv_writer = CsvWriter(output_streams, self._progress_callback)
    csv_writer.write_to_csv(course_id)