From 71d41b4d48772c9eb61efb1410baf170ca825bb9 Mon Sep 17 00:00:00 2001
From: Gary Gregory <gardgregory@gmail.com>
Date: Fri, 5 Jul 2019 13:10:34 -0400
Subject: [PATCH] Comment empty blocks.

---
 .../commons/collections4/map/AbstractReferenceMap.java       | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/apache/commons/collections4/map/AbstractReferenceMap.java b/src/main/java/org/apache/commons/collections4/map/AbstractReferenceMap.java
index e52facbf1..21fa492ca 100644
--- a/src/main/java/org/apache/commons/collections4/map/AbstractReferenceMap.java
+++ b/src/main/java/org/apache/commons/collections4/map/AbstractReferenceMap.java
@@ -302,7 +302,9 @@ public abstract class AbstractReferenceMap<K, V> extends AbstractHashedMap<K, V>
     public void clear() {
         super.clear();
         // drain the queue
-        while (queue.poll() != null) {} // NOPMD
+        while (queue.poll() != null) {
+            // empty
+        }
     }
 
     //-----------------------------------------------------------------------
@@ -734,6 +736,7 @@ public abstract class AbstractReferenceMap<K, V> extends AbstractHashedMap<K, V>
          * This is the callback for custom "after purge" logic
          */
         protected void onPurge() {
+            // empty
         }
 
         /**