diff --git a/pytorch_lightning/root_module/model_saving.py b/pytorch_lightning/root_module/model_saving.py
index 1ac91fd308..ba0c89293e 100644
--- a/pytorch_lightning/root_module/model_saving.py
+++ b/pytorch_lightning/root_module/model_saving.py
@@ -21,6 +21,9 @@ class ModelIO(object):
         """
         raise NotImplementedError
 
+    # -------------------------
+    # OPTIONAL HOOKS
+    # -------------------------
     def on_hpc_save(self):
         """
         Hook to do whatever you need right before Slurm manager saves the model