@Override
	public boolean check() {	
		//TODO: check array values!
		return players != null
			&& stockNames != null && initialStockValues != null
			&& stockNames.length == initialStockValues.length
			
			&& unitNames != null && initialUnits != null && initialUnitCosts != null
			&& unitNames.length == initialUnits.length
			&& unitNames.length == initialUnitCosts.length;
	}