Pattern for blue compatible modules

module.js

modules.export = (function(){
  var Promise = require('bluebird');
  var fs = Promise.promisifyAll(require('fs'));
  return function(params, cb) {
    return fs.doSomeStuffAsync(params)
      .then(function(result){
        return someOtherAsync(result);
      })
      .then(function(moreResults){
        return someMoreAsync(moreResults);
      })
      .finally(cb || function(){ });
  };
})();

Thanks for advice! Working it in now