gistfile1.txt

/**
 * Implements hook_theme_registry_alter().
 */
function my_module_theme_registry_alter(&$theme_registry) {

  $theme_registry['paragraph__paragraph_citation'] = $theme_registry['paragraph'];
  $theme_registry['paragraph__paragraph_citation']['theme path'] = drupal_get_path('module', 'my_module');
  $theme_registry['paragraph__paragraph_citation']['template'] = 'paragraph--paragraph-citation';
  $theme_registry['paragraph__paragraph_citation']['path'] = drupal_get_path('module', 'my_module') . '/templates';

}