bla.js

   var MyModul = (function () {
        var pub = {}, SubModule, SubObject = {}

        SubObject = {
            myProperty: 'test',

            doSomething: function(callback) {
                console.log('SubObject:doSomething' + this.myProperty);
                callback();
            }
        }

        function subObjectCallBack() {
            console.log('subObjectCallback');
        }


        SubModule = (function() {
            var pub = {};

            pub.doSomething = function(callback) {
                console.log('SubModule::doSomething');
                callback();
            }
            return pub;
        })();

        function subModule1CallBack() {
            console.log('subModuleCallback');
        }


        pub.test = function() {
            console.log('test');
            SubModule.doSomething(subModule1CallBack);
            SubObject.doSomething(subObjectCallBack);
        }

        return pub;
    })();