LockableFileWriter.close() should fail when the lock file cannot be

deleted.

Author: Gary Gregory

src/changes/changes.xml

@@ -105,6 +105,9 @@ The <action> type attribute can be add,update,fix,remove.
       <action issue="IO-705" dev="ggregory" type="fix" due-to="Hao Zhong, Gary Gregory">
         MarkShieldInputStream#reset should throw UnsupportedOperationException.
       </action>
+      <action issue="IO-705" dev="ggregory" type="fix" due-to="Hao Zhong, Gary Gregory">
+        LockableFileWriter.close() should fail when the lock file cannot be deleted.
+      </action>
       <!-- ADD -->
       <action dev="ggregory" type="add" due-to="Gary Gregory">
         Add FileSystemProviders class.

src/main/java/org/apache/commons/io/output/LockableFileWriter.java

@@ -279,7 +279,7 @@ private Writer initWriter(final File file, final Charset charset, final boolean
     }
 
     /**
-     * Closes the file writer and deletes the lock file (if possible).
+     * Closes the file writer and deletes the lock file.
      *
      * @throws IOException if an I/O error occurs
      */
@@ -288,7 +288,7 @@ public void close() throws IOException {
         try {
             out.close();
         } finally {
-            lockFile.delete();
+            FileUtils.delete(lockFile);
         }
     }