diff --git a/broker/src/main/java/io/moquette/server/netty/metrics/BytesMetricsCollector.java b/broker/src/main/java/io/moquette/server/netty/metrics/BytesMetricsCollector.java
index 84a11b2b..45d61e3e 100644
--- a/broker/src/main/java/io/moquette/server/netty/metrics/BytesMetricsCollector.java
+++ b/broker/src/main/java/io/moquette/server/netty/metrics/BytesMetricsCollector.java
@@ -13,6 +13,7 @@
  *
  * You may elect to redistribute this code under either of these licenses.
  */
+
 package io.moquette.server.netty.metrics;
 
 import java.util.concurrent.atomic.AtomicLong;