try {
			preparedStatementIme.executeUpdate();
			preparedStatementTezina.executeUpdate();
		} catch (SQLException exception) {
			connection.rollback();
			if (exception.getMessage().indexOf("checktezina") != -1) {
				throw new SQLException("Težina mora biti veća od nule.",
					exception.getSQLState(), -746);
			} else {
				throw exception;
			}
		}
		connection.commit();