diff --git a/3. Java Servlet Web App Tutorial/3-Authorization-II/groups/src/main/java/com/microsoft/azuresamples/msal4j/authservlets/AuthenticationFilter.java b/3. Java Servlet Web App Tutorial/3-Authorization-II/groups/src/main/java/com/microsoft/azuresamples/msal4j/authservlets/AuthenticationFilter.java
index 20eeabb..69f8acf 100644
--- a/3. Java Servlet Web App Tutorial/3-Authorization-II/groups/src/main/java/com/microsoft/azuresamples/msal4j/authservlets/AuthenticationFilter.java	
+++ b/3. Java Servlet Web App Tutorial/3-Authorization-II/groups/src/main/java/com/microsoft/azuresamples/msal4j/authservlets/AuthenticationFilter.java	
@@ -65,6 +65,11 @@ public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
         }
     }
 
+        @Override
+    public void init(FilterConfig filterConfig) {
+
+    }
+    
     private void sendToUnauthorizedPage(HttpServletRequest req, HttpServletResponse resp)
             throws IOException, ServletException {
         req.setAttribute("bodyContent", "content/401.jsp");
@@ -154,4 +159,4 @@ private Map<String,Set<String>> parse(List<String> routeAndRequiredGroupOrRole,
         }
         return parsedRoutes;
     }
-}
\ No newline at end of file
+}