diff --git a/broker/src/main/java/io/moquette/spi/security/IAuthenticator.java b/broker/src/main/java/io/moquette/spi/security/IAuthenticator.java
index 8dee04b2..8df8a090 100644
--- a/broker/src/main/java/io/moquette/spi/security/IAuthenticator.java
+++ b/broker/src/main/java/io/moquette/spi/security/IAuthenticator.java
@@ -13,11 +13,12 @@
  *
  * You may elect to redistribute this code under either of these licenses.
  */
+
 package io.moquette.spi.security;
 
 /**
  * username and password checker
- * 
+ *
  * @author andrea
  */
 public interface IAuthenticator {