From cd66a9ef61125f84187077cbf691c2b1bd3b12a4 Mon Sep 17 00:00:00 2001
From: Anthony Whitford <anthony@whitford.com>
Date: Tue, 13 Oct 2015 23:59:11 -0700
Subject: [PATCH] Demonstrating the benefit of commons-io instead of the
 simpler string dissection.

---
 .../main/java/org/owasp/dependencycheck/utils/FileUtils.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dependency-check-utils/src/main/java/org/owasp/dependencycheck/utils/FileUtils.java b/dependency-check-utils/src/main/java/org/owasp/dependencycheck/utils/FileUtils.java
index 9d16cada2..84fa670c0 100644
--- a/dependency-check-utils/src/main/java/org/owasp/dependencycheck/utils/FileUtils.java
+++ b/dependency-check-utils/src/main/java/org/owasp/dependencycheck/utils/FileUtils.java
@@ -60,7 +60,7 @@ public final class FileUtils {
      */
     public static String getFileExtension(String fileName) {
         final String fileExt = FilenameUtils.getExtension(fileName);
-        return null != fileExt ? fileExt.toLowerCase() : null;
+        return null == fileExt || fileExt.isEmpty() ? null : fileExt.toLowerCase();
     }
 
     /**