Add a common class

Common/src/main/java/com/example/examplemod/CommonClass.java

@@ -0,0 +1,14 @@
+package com.example.examplemod;
+
+import net.minecraft.core.Registry;
+import net.minecraft.world.item.Items;
+
+public class CommonClass {
+    
+    public static void init() {
+        
+        System.out.println("Hello from Common init!");
+        System.out.println("Diamond Item >> " + Registry.ITEM.getKey(Items.DIAMOND));
+    }
+    
+}

Fabric/src/main/java/com/example/examplemod/ExampleMod.java

@@ -1,4 +1,4 @@
-package net.fabricmc.example;
+package com.example.examplemod;
 
 import net.fabricmc.api.ModInitializer;
 
@@ -11,6 +11,7 @@ public class ExampleMod implements ModInitializer {
         // Proceed with mild caution.
         
         System.out.println("Hello Fabric world!");
+        CommonClass.init();
     }
     
 }

Fabric/src/main/java/com/example/examplemod/mixin/ExampleMixin.java

@@ -1,4 +1,4 @@
-package net.fabricmc.example.mixin;
+package com.example.examplemod.mixin;
 
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.screens.TitleScreen;

Fabric/src/main/resources/fabric.mod.json

@@ -19,7 +19,7 @@
     "environment": "*",
     "entrypoints": {
       "main": [
-        "net.fabricmc.example.ExampleMod"
+        "com.example.examplemod.ExampleMod"
       ]
     },
     "mixins": [

Fabric/src/main/resources/modid.mixins.json

@@ -1,7 +1,7 @@
 {
     "required": true,
     "minVersion": "0.8",
-    "package": "net.fabricmc.example.mixin",
+    "package": "com.example.examplemod.mixin",
     "compatibilityLevel": "JAVA_16",
     "mixins": [
     ],

Forge/src/main/java/com/example/examplemod/ExampleMod.java

@@ -31,6 +31,7 @@ public class ExampleMod {
         
         LOGGER.info("HELLO FROM PREINIT");
         LOGGER.info("DIRT BLOCK >> {}", Blocks.DIRT.getRegistryName());
+        CommonClass.init();
     }
     
     private void enqueueIMC(final InterModEnqueueEvent event) {