diff --git a/src/tools/Logger.java b/src/tools/Logger.java
index 1fdb4ad..ce0f82e 100644
--- a/src/tools/Logger.java
+++ b/src/tools/Logger.java
@@ -34,17 +34,21 @@ public class Logger {
 	 * @param text	Text to log
 	 */
 	public void write(String text, LogLevel logLevel) {
+		String colorize = "\u001B[0";
 		String msg = "[" + new Timestamp(System.currentTimeMillis()) + "] " + text + "\n";
 		String level = null;
 		switch (logLevel) {
 			case Error:
 				level = "[Error]";
+				colorize = "\u001B[31m"; // RED
 				break;
 			case Info:
 				level = "[Info]";
+				colorize = "\u001B[32m"; // GREEN
 				break;
 			case Warning:
 				level = "[Warning]";
+				colorize = "\u001B[33m"; // YELLOW
 				break;
 			case Action:
 				level = "[Action]";
@@ -64,7 +68,7 @@ public class Logger {
 			case Warning:
 			case Debug:
 			default:
-				System.err.println(text);
+				System.err.println(colorize + text + "\u001B[0m");
 				break;
 			case Action:
 				break;
diff --git a/src/tools/PortRange.java b/src/tools/PortRange.java
index 290cc94..ef184ab 100644
--- a/src/tools/PortRange.java
+++ b/src/tools/PortRange.java
@@ -6,7 +6,7 @@ package tools;
  * @author	JS Auge
  * @version	1.0
  */
-public class PortRange {
+public abstract class PortRange {
 
 	protected int portMax;
 	protected int portMin;
@@ -34,7 +34,7 @@ public class PortRange {
 	}
 
 	/** To String
-	 * @return String representation
+	 * @return	String representation
 	 */
 	 public String toString() {
 		 return "default " + type + "port: " + defaultPort + "(range: " + portMin + " -> " + portMax + ")";