ObjectMapper mapper = new ObjectMapper();
public void loadSystem() throws JsonGenerationException, JsonMappingException, IOException
{
Sun sun = new Sun();
sun.setId(1);
sun.setName("Sun");
sun.setSize(50);
sun.setStartColor(new Vector4f(100,100,100,100));
sun.setEndColor(new Vector4f(200,200,200,200));
Planet merkury = new Planet();
merkury.setId(1);
merkury.setName("Merkury");