Rest Store URL 404

I have created a module with a rest store but the url returns a 404.  I have the follwing: 

    [RestStore("teststore")]
    public class StoreHandlerSample : RestControllerBase

    return declare("ddd.ModuleInitializer", [_Module], {
        initialize: function () {
            this.inherited(arguments);
            var registry = this.resolveDependency("epi.storeregistry");
            registry.create("teststore", this._getRestPath("teststore"));
        },
        _getRestPath: function (name) {
            return routes.getRestPath({ moduleArea: "Demo", storeName: name });
        }
    });

My module is called demo but when I hit localhost/modules/Demo/Stores/teststore I am getting a 404 error.

Any help would be appreciated.

Thanks