`operatorJSON` shoud be a local variable for `getResources()`, we shouldn't access it in `addEntry()`, I suggest return file path for `copyResource()` & all `get*Resource()` and it should look like:

```js
Resources.prototype.getResources = function(conf) {
  var operatorJSON = {};

  operatorJSON['default_contacts'] =
    this.copyResource(conf.default_contacts, 'default_contacts');
  operatorJSON['support_contacts'] =
    this.copyResource(conf.support_contacts, 'support_contacts');
  ...
  operatorJSON['wallpaper'] = this.getWallpaperResource(conf.wallpaper);
  ...
};
```