другой вариант :)
HUMAN_FIGHTER(0, ClassType.FIGHTER, Race.HUMAN, null, ClassLevel.FIRST, null, "Воин"),
WARRIOR(1, ClassType.FIGHTER, Race.HUMAN, HUMAN_FIGHTER, ClassLevel.SECOND, ClassGroup.WARRIOR, "Воитель"),
GLADIATOR(2, ClassType.FIGHTER, Race.HUMAN, WARRIOR, ClassLevel.THIRD...