diff --git a/algorithm-exercises-java/build.gradle b/algorithm-exercises-java/build.gradle
index e9bb9a2..447b64b 100644
--- a/algorithm-exercises-java/build.gradle
+++ b/algorithm-exercises-java/build.gradle
@@ -42,7 +42,7 @@ tasks.named('test') {
 }
 
 checkstyle {
-    toolVersion = '10.17.0'
+    toolVersion = '10.18.0'
     configFile = file("${rootDir}/checkstyle.xml")
     maxErrors	= 0
     maxWarnings	= 0
diff --git a/algorithm-exercises-java/src/main/java/util/CustomLogger.java b/algorithm-exercises-java/src/main/java/util/CustomLogger.java
index b39649c..5fcdda7 100644
--- a/algorithm-exercises-java/src/main/java/util/CustomLogger.java
+++ b/algorithm-exercises-java/src/main/java/util/CustomLogger.java
@@ -1,7 +1,9 @@
 package util;
 
 /**
- * https://www.logicbig.com/tutorials/core-java-tutorial/logging/levels.html
+ * CustomLogger.
+ *
+ * @link https://www.logicbig.com/tutorials/core-java-tutorial/logging/levels.html
  */
 public class CustomLogger {