public void updateContact ( Contact contact)
		{
			string sql = "UPDATE `SmsApplicatie`.`contact` " +
			             "SET" +
			             "telephoneNumber=:telephoneNumber," +
			             "alias=:alias," +
			             "firstName=:firstName," +
			             "lastName=:lastName," +
			             "emailAddress=:emailAddress WHERE id=:id";
			MySqlCommand statement = databaseConnection.CreateCommand ();
			statement.CommandText = sql;
			statement.Prepare ();
			statement.Parameters.AddWithValue( "telephoneNumber", contact.getTelephoneNumber());
			statement.Parameters.AddWithValue ( "alias", contact.getAlias());
			statement.Parameters.AddWithValue ( "firstName", contact.getFirstName() );
			statement.Parameters.AddWithValue ( "lastName", contact.getLastName() );
			statement.Parameters.AddWithValue ( "emailAddress", contact.getEmailAddress() );

			if ( statement.ExecuteNonQuery () == 0 ){
				throw new ApplicationException ();
			}

		}
		public void insertContact ( Contact contact)
		{
			string sql = "INSERT INTO `SmsApplicatie`.`contacts`(telephoneNumber, alias, firstName, lastName, emailAddress ) " +
				"VALUES :telephoneNumber, :alias, :firstName, :lastName, :emailAddress";

			MySqlCommand statement = this.databaseConnection.CreateCommand ();
			statement.CommandText = sql;
			statement.Prepare ();
			statement.Parameters.AddWithValue ("telephoneNumber", contact.getTelephoneNumber ());
			statement.Parameters.AddWithValue ("alias", contact.getAlias ());
			statement.Parameters.AddWithValue ("firstName", contact.getFirstName ());
			statement.Parameters.AddWithValue ("lastName", contact.getLastName ());
			statement.Parameters.AddWithValue ("emailAddress", contact.getEmailAddress ());

			if ( statement.ExecuteNonQuery () == 0 ){
				throw new ApplicationException ();
			}
		}