Fixed checkStyle and ErrorProne warns

broker/src/main/java/io/moquette/interception/HazelcastInterceptHandler.java

@@ -24,6 +24,7 @@ import io.netty.buffer.ByteBuf;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import static io.moquette.spi.impl.Utils.readBytesAndRewind;
+import static java.nio.charset.StandardCharsets.UTF_8;
 
 public class HazelcastInterceptHandler extends AbstractInterceptHandler {
 
@@ -45,7 +46,8 @@ public class HazelcastInterceptHandler extends AbstractInterceptHandler {
         ByteBuf payload = msg.getPayload();
         byte[] payloadContent = readBytesAndRewind(payload);
 
-        LOG.info("{} publish on {} message: {}", msg.getClientID(), msg.getTopicName(), new String(payloadContent));
+        LOG.info("{} publish on {} message: {}", msg.getClientID(), msg.getTopicName(),
+                 new String(payloadContent, UTF_8));
         ITopic<HazelcastMsg> topic = hz.getTopic("moquette");
         HazelcastMsg hazelcastMsg = new HazelcastMsg(msg);
         topic.publish(hazelcastMsg);

broker/src/main/java/io/moquette/interception/messages/InterceptConnectMessage.java

@@ -18,6 +18,8 @@ package io.moquette.interception.messages;
 
 import io.netty.handler.codec.mqtt.MqttConnectMessage;
 
+import java.nio.charset.StandardCharsets;
+
 public class InterceptConnectMessage extends InterceptAbstractMessage {
 
     private final MqttConnectMessage msg;
@@ -72,7 +74,7 @@ public class InterceptConnectMessage extends InterceptAbstractMessage {
     }
 
     public byte[] getPassword() {
-        return msg.payload().password().getBytes();
+        return msg.payload().password().getBytes(StandardCharsets.UTF_8);
     }
 
     public String getWillTopic() {
@@ -80,6 +82,6 @@ public class InterceptConnectMessage extends InterceptAbstractMessage {
     }
 
     public byte[] getWillMessage() {
-        return msg.payload().willMessage().getBytes();
+        return msg.payload().willMessage().getBytes(StandardCharsets.UTF_8);
     }
 }