diff --git a/src/main/java/de/ctdo/bunti/artnet/ByteUtils.java b/src/main/java/de/ctdo/bunti/artnet/ByteUtils.java
index c702647..10c0232 100644
--- a/src/main/java/de/ctdo/bunti/artnet/ByteUtils.java
+++ b/src/main/java/de/ctdo/bunti/artnet/ByteUtils.java
@@ -28,7 +28,7 @@ public class ByteUtils {
     private final byte[] data;
 
     public ByteUtils(byte[] data) {
-        this.data = data;
+        this.data = data.clone();
     }
     
     public static int byteToUint(byte b) {
@@ -40,7 +40,7 @@ public class ByteUtils {
     }
 
     public final byte[] getBytes() {
-        return data;
+        return data.clone();
     }
 
     public final int getInt16(int offset) {
diff --git a/src/main/java/de/ctdo/bunti/artnet/packets/ArtNetPacket.java b/src/main/java/de/ctdo/bunti/artnet/packets/ArtNetPacket.java
index a63e753..2beaae6 100644
--- a/src/main/java/de/ctdo/bunti/artnet/packets/ArtNetPacket.java
+++ b/src/main/java/de/ctdo/bunti/artnet/packets/ArtNetPacket.java
@@ -37,7 +37,7 @@ public abstract class ArtNetPacket {
     }
 
     public final void setData(byte[] data) {
-        this.data = new ByteUtils(data);
+        this.data = new ByteUtils(data.clone());
     }
 
     public final PacketType getType() {
diff --git a/src/main/java/de/ctdo/bunti/artnet/packets/PacketType.java b/src/main/java/de/ctdo/bunti/artnet/packets/PacketType.java
index 874e8d3..a5c3dd8 100644
--- a/src/main/java/de/ctdo/bunti/artnet/packets/PacketType.java
+++ b/src/main/java/de/ctdo/bunti/artnet/packets/PacketType.java
@@ -19,6 +19,9 @@
 
 package de.ctdo.bunti.artnet.packets;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 public enum PacketType {
 
     ART_POLL(0x2000, null),
@@ -47,6 +50,8 @@ public enum PacketType {
 
     private final int opCode;
     private final Class<? extends ArtNetPacket> packetClass;
+    private static final Logger LOGGER = LoggerFactory.getLogger(PacketType.class);
+
 
     private PacketType(int code, Class<? extends ArtNetPacket> clazz) {
         opCode = code;
@@ -59,9 +64,9 @@ public enum PacketType {
             try {
                 p = packetClass.newInstance();
             } catch (InstantiationException e) {
-                e.printStackTrace();
+                LOGGER.error("Could not instanciate ArtNetPacket: ",e);
             } catch (IllegalAccessException e) {
-                e.printStackTrace();
+                LOGGER.error("Could not instanciate ArtNetPacket: ",e);
             }
         }
         return p;
diff --git a/src/main/java/de/ctdo/bunti/model/BuntiDevice.java b/src/main/java/de/ctdo/bunti/model/BuntiDevice.java
index c275e12..4bcb9d3 100644
--- a/src/main/java/de/ctdo/bunti/model/BuntiDevice.java
+++ b/src/main/java/de/ctdo/bunti/model/BuntiDevice.java
@@ -27,12 +27,12 @@ public abstract class BuntiDevice {
      */
     @Transient
     public final String getType() {
-        String FQClassName = this.getClass().getName();
-        int firstChar = FQClassName.lastIndexOf ('.') + 1;
+        String fqClassName = this.getClass().getName();
+        int firstChar = fqClassName.lastIndexOf ('.') + 1;
         if ( firstChar > 0 ) {
-            FQClassName = FQClassName.substring ( firstChar );
+            fqClassName = fqClassName.substring ( firstChar );
         }
-        return FQClassName;
+        return fqClassName;
     }
 
     /**