/* The to be imported module */
angular
    .module('myModule', [])
    .factory('myFactory', function () {
        var setting = null;

        var myFactory = {
            initialize : initialize,
            action1 : action1,
            ...
        };

        return myFactory;

        function initialize(obj) {
            if (typeof setting == null) {
                setting = obj;
            }
        }
    });

/* Main app */
angular
    .module('myApp', ['myModule'])
    .app(function(myFactory) {
        myFactory.initialize(someFile);
    });