public override void buyJewelry(Nation nation) { }
public override void buildWorks(Nation nation) { }
public override void buildPalace(Nation nation) { }
public override void buildBarracks(Nation nation) { }
abstract public void buyJewelry(Nation nation);
abstract public void buildPalace(Nation nation);
abstract public void buildWorks(Nation nation);
abstract public void buildBarracks(Nation nation);