diff --git a/broker/src/main/java/io/moquette/spi/impl/QosPublishHandler.java b/broker/src/main/java/io/moquette/spi/impl/QosPublishHandler.java
index 6f5988f4..ab1af41a 100644
--- a/broker/src/main/java/io/moquette/spi/impl/QosPublishHandler.java
+++ b/broker/src/main/java/io/moquette/spi/impl/QosPublishHandler.java
@@ -1,30 +1,32 @@
+
 package io.moquette.spi.impl;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-
 import io.moquette.server.netty.NettyUtils;
 import io.moquette.spi.security.IAuthorizator;
 import io.netty.channel.Channel;
 
 abstract class QosPublishHandler {
-	
-	private static final Logger LOG = LoggerFactory.getLogger(QosPublishHandler.class);
-	
-	private final IAuthorizator m_authorizator;
-	
-	protected QosPublishHandler(IAuthorizator m_authorizator) {
-		this.m_authorizator = m_authorizator;
-	}
 
-	public boolean checkWriteOnTopic(String topic, Channel channel) {
-		String clientID = NettyUtils.clientID(channel);
-		String username = NettyUtils.userName(channel);
-		if (!m_authorizator.canWrite(topic, username, clientID)) {
-			LOG.error("The MQTT client is not authorized to publish on topic. MqttClientId = {}, topic = {}.", clientID,
-					topic);
-			return true;
-		}
-		return false;
-	}
+    private static final Logger LOG = LoggerFactory.getLogger(QosPublishHandler.class);
+
+    private final IAuthorizator m_authorizator;
+
+    protected QosPublishHandler(IAuthorizator m_authorizator) {
+        this.m_authorizator = m_authorizator;
+    }
+
+    public boolean checkWriteOnTopic(String topic, Channel channel) {
+        String clientID = NettyUtils.clientID(channel);
+        String username = NettyUtils.userName(channel);
+        if (!m_authorizator.canWrite(topic, username, clientID)) {
+            LOG.error(
+                    "The MQTT client is not authorized to publish on topic. MqttClientId = {}, topic = {}.",
+                    clientID,
+                    topic);
+            return true;
+        }
+        return false;
+    }
 }