diff --git a/src/main/java/com/minelittlepony/unicopia/forgebullshit/ItemModels.java b/src/main/java/com/minelittlepony/unicopia/forgebullshit/ItemModels.java
index 528a05c9..4208b8c3 100644
--- a/src/main/java/com/minelittlepony/unicopia/forgebullshit/ItemModels.java
+++ b/src/main/java/com/minelittlepony/unicopia/forgebullshit/ItemModels.java
@@ -1,5 +1,9 @@
 package com.minelittlepony.unicopia.forgebullshit;
 
+import java.util.Objects;
+
+import javax.annotation.Nonnull;
+
 import net.minecraft.client.renderer.block.model.ModelResourceLocation;
 import net.minecraft.item.Item;
 import net.minecraftforge.client.model.ModelLoader;
@@ -11,6 +15,10 @@ public class ItemModels {
      */
     public static void registerAll(Item...items) {
         for (Item i : items) {
+
+            Objects.requireNonNull(i, "Cannot register models: Null is not a valid item.");
+            Objects.requireNonNull(i.getRegistryName(), "You canot register an item with no registry name.");
+
             if (i instanceof IMultiItem && i.getHasSubtypes()) {
                 IMultiItem multi = (IMultiItem)i;
 
@@ -25,7 +33,7 @@ public class ItemModels {
         }
     }
 
-    private static void registerAll(Item item, int maxMeta, ModelResourceLocation resource) {
+    private static void registerAll(@Nonnull Item item, int maxMeta, ModelResourceLocation resource) {
         for (int i = 0; i < maxMeta; i++) {
             ModelLoader.setCustomModelResourceLocation(item, i, resource);
         }
@@ -34,11 +42,11 @@ public class ItemModels {
     /**
      * Registers a model for the given item and all associated variants.
      */
-    public static void registerAllVariants(Item item, String... variants) {
+    public static void registerAllVariants(@Nonnull Item item, String... variants) {
         registerAllVariants(item, item.getRegistryName().getNamespace(), variants);
     }
 
-    public static void registerAllVariants(Item item, String domain, String... variants) {
+    public static void registerAllVariants(@Nonnull Item item, String domain, String... variants) {
         for (int i = 0; i < variants.length; i++) {
             ModelLoader.setCustomModelResourceLocation(item, i, new ModelResourceLocation(domain + ":" + variants[i]));
         }