abstract addon id

platforms/fabric/src/main/java/com/dfsek/terra/fabric/FabricAddon.java

@@ -0,0 +1,16 @@
+package com.dfsek.terra.fabric;
+
+import com.dfsek.terra.mod.MinecraftAddon;
+import com.dfsek.terra.mod.ModPlatform;
+
+public class FabricAddon extends MinecraftAddon {
+
+    public FabricAddon(ModPlatform modPlatform) {
+        super(modPlatform);
+    }
+
+    @Override
+    public String getID() {
+        return "terra-fabric";
+    }
+}

platforms/fabric/src/main/java/com/dfsek/terra/fabric/PlatformImpl.java

@@ -143,4 +143,9 @@ public class PlatformImpl extends ModPlatform {
     public @NotNull ItemHandle getItemHandle() {
         return itemHandle;
     }
+
+    @Override
+    public BaseAddon getPlatformAddon() {
+        return new FabricAddon(this);
+    }
 }