diff --git a/javaecs/src/main/java/nz/ac/massey/javaecs/ComponentManager.java b/javaecs/src/main/java/nz/ac/massey/javaecs/ComponentManager.java
index b9d879d..82d6599 100644
--- a/javaecs/src/main/java/nz/ac/massey/javaecs/ComponentManager.java
+++ b/javaecs/src/main/java/nz/ac/massey/javaecs/ComponentManager.java
@@ -17,13 +17,14 @@ class ComponentManager{
     Map<Type, Integer> componentPosIndex = new HashMap<>();
     int componentPos = 0;
 
-    public void registerComponent(Type type){
+    public boolean registerComponent(Type type){
         if (componentArrays.containsKey(type)){
-            System.err.println("Component " + type.getTypeName() + " is already registered");
-            return;
+            ECS.writeErr("Component " + type.getTypeName() + " is already registered");
+            return false;
         }
         componentArrays.put(type, new ComponentArray());
         componentPosIndex.put(type, componentPos++);
+        return true;
     }
 
     public void addComponentToEntity(Type componentName, Object componentData, int entity){