@Override
	public void delete(IEmailKontakt emailKontakt) {
		Connection con = null;
		try {
			con = initDBConnection();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		PreparedStatement ps = null;
		try {
			con.setAutoCommit(false);
			ps = con.prepareStatement("DELETE FROM Kontakt WHERE KontaktId = ?");
			ps.setInt(1, emailKontakt.getId());
			ps.executeUpdate();
			con.commit();
		} catch (SQLException e) {
			try {
				con.rollback();
			} catch (SQLException e1) {
				e1.printStackTrace();
			}
			e.printStackTrace();
		} finally {
			try {
				ps.close();
				con.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}