diff --git a/spring-batch-core/src/main/java/org/springframework/batch/core/domain/ChunkListener.java b/spring-batch-core/src/main/java/org/springframework/batch/core/domain/ChunkListener.java
index a8aabb9cf..24edcc548 100644
--- a/spring-batch-core/src/main/java/org/springframework/batch/core/domain/ChunkListener.java
+++ b/spring-batch-core/src/main/java/org/springframework/batch/core/domain/ChunkListener.java
@@ -25,7 +25,13 @@ package org.springframework.batch.core.domain;
  */
 public interface ChunkListener extends BatchListener {
 
+	/**
+	 * Callback before the chunk is executed, but inside the transaction.
+	 */
 	void beforeChunk();
 	
+	/**
+	 * Callback after the chunk is executed, but inside the transaction.
+	 */
 	void afterChunk();
 }