Normalize comment

Comment empty block
diff --git a/src/main/java/org/apache/commons/io/IOUtils.java b/src/main/java/org/apache/commons/io/IOUtils.java
index 8406b13..cd818a4 100644
--- a/src/main/java/org/apache/commons/io/IOUtils.java
+++ b/src/main/java/org/apache/commons/io/IOUtils.java
@@ -3940,6 +3940,7 @@
      */
     @Deprecated
     public IOUtils() { //NOSONAR
+        // empty
     }
 
 }