DataAccessObject

public class DataAccessObject {

    protected DataBaseSQLiteAdapter dbHelper;
    protected SQLiteDatabase database; // or db if you want

    public DataAccessObject(Context context) {
        dbHelper = new DataBaseSQLiteAdapter(context);
    }

    /**
     * Initializes the database of this data access object so it may be ready for queries
     */
    public void open() {
        database = dbHelper.getWritableDatabase();
    }

    public void close() {
        database.close();
    }

}