wisski_content_types-1.0.1/wisski_theme_content_types.module

<?php
//Adding the module's library
function wisski_theme_content_types_page_attachments(array &$attachments) {
  $attachments['#attached']['library'][] = 'wisski_theme_content_types/wisski_theme_content_types';
}

//Adding the module's translations
function wisski_theme_content_types_locale_translation_projects_alter(&$projects) {

  $projects['wisski_theme_content_types'] = array(
    'info' => array(
      'interface translation project' => 'wisski_theme_content_types', 
      'interface translation server pattern' => drupal_get_path('module', 'wisski_theme_content_types').'/translations/de-de.po', 
    ),
  );
}

//Adding the module's content types
function wisski_theme_content_types_theme($existing, $type, $theme, $path) {
    return array(
        'node__col_md_3' => array(
            'variables' => array('events' => NULL),
            'template' => 'node--col-md-3',
            'path' => $path . '/templates/nodes',
            'base hook' => 'node',
            ),
        'node__col_md_4' => array(
            'variables' => array('events' => NULL),
            'template' => 'node--col-md-4',
            'path' => $path . '/templates/nodes',
            'base hook' => 'node',
            ),
        'node__col_md_6' => array(
            'variables' => array('events' => NULL),
            'template' => 'node--col-md-6',
            'path' => $path . '/templates/nodes',
            'base hook' => 'node',
            ),
        'node__col_md_12' => array(
            'variables' => array('events' => NULL),
            'template' => 'node--col-md-12',
            'path' => $path . '/templates/nodes',
            'base hook' => 'node',
            ),
    );
}