diff --git a/java_gen/templates/custom/OFGroupInsertBucketVer15.Builder.java b/java_gen/templates/custom/OFGroupInsertBucketVer15.Builder.java
new file mode 100644
index 0000000..194c458
--- /dev/null
+++ b/java_gen/templates/custom/OFGroupInsertBucketVer15.Builder.java
@@ -0,0 +1,19 @@
+
+    public List<OFBucket> insertBucketBasedOnCommandBucketId(OFBucket bucket) {
+        if(commandBucketId == null)
+            throw new IllegalStateException("CommandBucketId is null");
+        if(commandBucketId.equals(OFGroupBucket.BUCKET_FIRST))
+            buckets.add(0, bucket);
+        else if(commandBucketId.equals(OFGroupBucket.BUCKET_LAST))
+            buckets.add(buckets.size(), bucket);
+        return buckets;
+    }
+
+
+    public List<OFBucket> insertBucketBasedOnSpecificIndex(OFBucket bucket, int index) {
+        if(index <= buckets.size())
+            buckets.add(index,bucket);
+        else
+            throw new IllegalStateException("Index is not valid");
+        return buckets;
+    }
\ No newline at end of file