Here is a part of the FMLInitializationEvent:
(sry: erz=ore in english)
GameRegistry.registerWorldGenerator(new BlockGenerator(eiserz.getDefaultState(), 15, 500), 6);
GameRegistry.registerWorldGenerator(new BlockGenerator(endererz.getDefaultState(), 15, 500), 6);
GameRegistry.registerWorldGenerator(new BlockGenerator(erdeerz.getDefaultState(), 15, 500), 6);
GameRegistry.registerWorldGenerator(new BlockGenerator(feuererz.getDefaultState(), 15, 500), 6);
GameRegistry.registerWorldGenerator(new BlockGenerator(lufterz.getDefaultState(), 15, 500), 6);
GameRegistry.registerWorldGenerator(new BlockGenerator(magieerz.getDefaultState(), 15, 500), 6);
GameRegistry.registerWorldGenerator(new BlockGenerator(naturerz.getDefaultState(), 15, 500), 6);
GameRegistry.registerWorldGenerator(new BlockGenerator(nethererz.getDefaultState(), 15, 500), 6);
GameRegistry.registerWorldGenerator(new BlockGenerator(untergrunderz.getDefaultState(), 15, 500), 6);
GameRegistry.registerWorldGenerator(new BlockGenerator(wassererz.getDefaultState(), 15, 500), 6);