diff --git a/src/examples/src/org/apache/poi/xssf/usermodel/examples/CellComments.java b/src/examples/src/org/apache/poi/xssf/usermodel/examples/CellComments.java
index 4eaa33d92d..252d7488a8 100644
--- a/src/examples/src/org/apache/poi/xssf/usermodel/examples/CellComments.java
+++ b/src/examples/src/org/apache/poi/xssf/usermodel/examples/CellComments.java
@@ -76,5 +76,6 @@ public class CellComments {
         wb.write(out);
         out.close();
 
+        wb.close();
     }
 }