Document doc = builder.build(this.cityFile);
Element city = doc.getRootElement();
this.id = this.cityFile.getName().split(" ")[0];
this.name = city.getAttributeValue("name");
this.position = new Position(city.getAttributeValue("position"));
this.resource = city.getAttributeValue("resource");
this.totalPopulation = Integer.valueOf(city.getChild("population").getAttributeValue("total"));
this.worker = Integer.valueOf(city.getChild("population").getAttributeValue("worker"));
this.miner = Integer.valueOf(city.getChild("population").getAttributeValue("miner"));