mymodule.module

<?php
/**
 * @file
 * A short description of this module.
 */

/**
 * Implements hook_config_info().
 */
function mymodule_config_info() {
  return array(
    'mymodule.settings' => array(
      'label' => t('MyModule settings'),
      'group' => t('Configuration'),
    ),
  );
}

/**
 * Implements hook_menu().
 */
function mymodule_menu() {
  return array(
    'admin/config/system/mymodule' => array(
      'title' => 'MyModule',
      'description' => 'Configure MyModule.',
      'page callback' => 'backdrop_get_form',
      'page arguments' => array('mymodule_configuration_form'),
      'access arguments' => array('administer mymodule'),
      'file' => 'mymodule.admin.inc',
    ),
  );
}

/**
 * Implements hook_permission().
 */
function mymodule_permission() {
  return array(
    'administer mymodule' => array(
      'title' => t('Administer MyModule'),
    ),
  );
}