Stores contests of the Database into a filename database.csv.

def store_contents(self):
        """
            Stores contests of the Database into a filename database.csv.
        """

        string_buffer = os.linesep.join(
            map(
                lambda x: ",".join(x),
                map(
                    lambda x: map(
                        str,
                        x.values()
                    ),
                    self.rows
                )
            )
        )

        with open(self.name + ".csv", "w") as f:
            f.write(string_buffer)