diff --git a/debugger/src/main/java/org/apache/pdfbox/debugger/ui/DebugLogAppender.java b/debugger/src/main/java/org/apache/pdfbox/debugger/ui/DebugLogAppender.java
index d17cf095f66..6c137cf5003 100644
--- a/debugger/src/main/java/org/apache/pdfbox/debugger/ui/DebugLogAppender.java
+++ b/debugger/src/main/java/org/apache/pdfbox/debugger/ui/DebugLogAppender.java
@@ -1,3 +1,19 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package org.apache.pdfbox.debugger.ui;
 
 import org.apache.logging.log4j.*;
@@ -12,31 +28,38 @@
 
 public class DebugLogAppender extends AbstractAppender
 {
-    protected DebugLogAppender(String name, Filter filter, Layout<? extends Serializable> layout, final boolean ignoreExceptions) {
+    protected DebugLogAppender(String name, Filter filter, Layout<? extends Serializable> layout,
+            final boolean ignoreExceptions)
+    {
         super(name, filter, layout, ignoreExceptions);
     }
 
     @Override
-    public void append(LogEvent event) {
+    public void append(LogEvent event)
+    {
         // forward to your logging dialog box here.
-        LogDialog.instance().log(event.getLoggerName(), event.getLevel().name(), event.getMessage().getFormattedMessage(), event.getThrown());
+        LogDialog.instance().log(event.getLoggerName(), event.getLevel().name(),
+                event.getMessage().getFormattedMessage(), event.getThrown());
     }
 
-    public static void setupCustomLogger() {
-        ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory.newConfigurationBuilder();
+    public static void setupCustomLogger()
+    {
+        ConfigurationBuilder<BuiltConfiguration> builder = ConfigurationBuilderFactory
+                .newConfigurationBuilder();
 
         AppenderComponentBuilder appenderBuilder = builder.newAppender("Stdout", "CONSOLE")
                 .addAttribute("target", ConsoleAppender.Target.SYSTEM_OUT);
-        appenderBuilder.add(builder.newLayout("PatternLayout")
-                .addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
+        appenderBuilder.add(builder.newLayout("PatternLayout").addAttribute("pattern",
+                "%d [%t] %-5level: %msg%n%throwable"));
         builder.add(appenderBuilder);
 
         appenderBuilder = builder.newAppender("Custom", "org.package.CustomAppender");
-        appenderBuilder.add(builder.newLayout("PatternLayout")
-                .addAttribute("pattern", "%d [%t] %-5level: %msg%n%throwable"));
+        appenderBuilder.add(builder.newLayout("PatternLayout").addAttribute("pattern",
+                "%d [%t] %-5level: %msg%n%throwable"));
         builder.add(appenderBuilder);
 
-        builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef("Stdout")).add(builder.newAppenderRef("Custom")));
+        builder.add(builder.newRootLogger(Level.ERROR).add(builder.newAppenderRef("Stdout"))
+                .add(builder.newAppenderRef("Custom")));
         Configurator.initialize(builder.build());
     }
-}
\ No newline at end of file
+}