diff --git a/src/main/java/com/r35157/nenjim/hubd/impl/ref/NenjimHubImpl.java b/src/main/java/com/r35157/nenjim/hubd/impl/ref/NenjimHubImpl.java
index 593ced7..92c484b 100644
--- a/src/main/java/com/r35157/nenjim/hubd/impl/ref/NenjimHubImpl.java
+++ b/src/main/java/com/r35157/nenjim/hubd/impl/ref/NenjimHubImpl.java
@@ -1,8 +1,10 @@
 package com.r35157.nenjim.hubd.impl.ref;
 
 import com.r35157.nenjim.hubd.NenjimHub;
+import com.r35157.nenjim.hubd.NenjimJournal;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.jetbrains.annotations.NotNull;
 
 public class NenjimHubImpl implements NenjimHub {
     @Override
@@ -10,5 +12,11 @@ public class NenjimHubImpl implements NenjimHub {
         log.debug("NOOP executed.");
     }
 
+    @Override
+    public void monitorJournal(@NotNull NenjimJournal nenjimJournal) {
+        log.warn("monitorJournal IS NOT IMPLEMENTED!");
+    }
+
+
     private static final Logger log = LogManager.getLogger(NenjimHubImpl.class);
 }