Every file must begin with a proper header. This header should be started within the first 10 lines of the file, so it is visible when loading the file in an editor. The file header must include:

Do

/**
 * File:
 *   io.ycp
 *
 * Module:
 *   Security configuration
 *
 * Summary:
 *   Input and output functions.
 *
 * Authors:
 *   Michal Svec <msvec@suse.cz>
 *
 * $**Id$
 *
 * There are in this file all functions needed for
 * the input and output of security settings.
 */

Don't

{
  // a small example with no version and no hint
  // about the author.
  return 42;
}