Init database and prepare tables

def init_db(self):
        """
        Init database and prepare tables
        """

        # database file
        db_path = self.get_data_file("data.sqlite")

        # comect and create cursor
        self.db = sqlite3.connect(db_path)
        self.cursor = self.db.cursor()

        # prep tables
        self.db_exec('''
            CREATE TABLE IF NOT EXISTS shortcuts (
                id INTEGER PRIMARY KEY AUTOINCREMENT,
                name TEXT NOT NULL,
                path TEXT NOT NULL,
                command TEXT NOT NULL
            )
            ''')