ConfigurationUtil.java

public final class ConfigurationUtil {

    private ConfigurationUtil() {}

    private static ConfigurationService configurationService = Sponge.getServiceManager().provide(ConfigurationService.class).get();

    private static List<Configuration> configurationList = new ArrayList<>();

    public static void registerConfigs() {
        registerConfig("global", new GlobalConfig());
    }

    private static void registerConfig(String id, Configuration config) {
        configurationService.register(getId(), id, config);
        configurationList.add(config);
    }

    public static void loadAll() {
        configurationList.forEach((config) -> {
            try {
                config.load();
            } catch (IOException e) {
                e.printStackTrace();
            }
        });
    }

}

FoundationsCore.java

@Listener
public void onPreInit(GamePreInitializationEvent e) {
  registerConfigs();
  loadAll();
}

log.log

[19:51:00] [Server thread/ERROR] [Sponge]: Could not pass FMLPreInitializationEvent to org.spongepowered.mod.plugin.SpongeModPluginContainer@2574cd42
java.lang.ExceptionInInitializerError
	at com.kinggoesgaming.foundations.core.FoundationsCore.onPreInitialization(FoundationsCore.java:112) ~[FoundationsCore.class:?]
	at org.spongepowered.common.event.listener.GamePreInitializationEventListener_FoundationsCore_onPreInitialization4.handle(Unknown Source) ~[?:?]
	at org.spongepowered.common.event.RegisteredListener.handle(RegisteredListener.java:86) ~[RegisteredListener.class:1.8.9-1808-4.1.0-BETA-1227]
	at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:239) [SpongeModEventManager.class:1.8.9-1808-4.1.0-BETA-1227]
	at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:283) [SpongeModEventManager.class:1.8.9-1808-4.1.0-BETA-1227]
	at org.spongepowered.mod.SpongeMod.onStateEvent(SpongeMod.java:183) [SpongeMod.class:1.8.9-1808-4.1.0-BETA-1227]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_74]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_74]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74]
	at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) [minecraft_server.1.8.9.jar:?]
	at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) [minecraft_server.1.8.9.jar:?]
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) [minecraft_server.1.8.9.jar:?]
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) [minecraft_server.1.8.9.jar:?]
	at com.google.common.eventbus.EventBus.post(EventBus.java:275) [minecraft_server.1.8.9.jar:?]
	at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:211) [LoadController.class:?]
	at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:189) [LoadController.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_74]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_74]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74]
	at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) [minecraft_server.1.8.9.jar:?]
	at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) [minecraft_server.1.8.9.jar:?]
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) [minecraft_server.1.8.9.jar:?]
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) [minecraft_server.1.8.9.jar:?]
	at com.google.common.eventbus.EventBus.post(EventBus.java:275) [minecraft_server.1.8.9.jar:?]
	at net.minecraftforge.fml.common.LoadController.redirect$onPost$0(LoadController.java:53) [LoadController.class:?]
	at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118) [LoadController.class:?]
	at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:556) [Loader.class:?]
	at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:88) [FMLServerHandler.class:?]
	at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:320) [FMLCommonHandler.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:112) [ko.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:441) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_74]
Caused by: java.util.NoSuchElementException: No value present
	at java.util.Optional.get(Optional.java:135) ~[?:1.8.0_74]
	at com.kinggoesgaming.foundations.core.util.ConfigurationUtil.<clinit>(ConfigurationUtil.java:21) ~[ConfigurationUtil.class:?]
	... 34 more