// `bookmarksDatabaseHelper` is used in `onCreate()`, `updateBookmarksListView()`, `selectAllBookmarksInFolder()`, and `onDestroy()`.
private BookmarksDatabaseHelper bookmarksDatabaseHelper;
// `bookmarksDatabaseHelper` is used in `onCreate()`, `updateBookmarksListView()`, `selectAllBookmarksInFolder()`, and `onDestroy()`.
private BookmarksDatabaseHelper bookmarksDatabaseHelper;