Make sure files get closed even when there is an exception.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@268126 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/optional/PropertyFile.java

@@ -245,10 +245,10 @@ public class PropertyFile extends Task
     */
     private void writeFile() throws BuildException 
     {
+        BufferedOutputStream bos = null;
         try 
         {
-            BufferedOutputStream bos = new BufferedOutputStream(
-                                         new FileOutputStream(m_propertyfile));
+            bos = new BufferedOutputStream(new FileOutputStream(m_propertyfile));
 
             // Write the message if we have one.
             if (m_comment != null) 
@@ -275,12 +275,18 @@ public class PropertyFile extends Task
                 bos.write(NEWLINE.getBytes());
                 bos.flush();
             }
-            bos.close();
         }
         catch (IOException ioe) 
         {
             throw new BuildException(ioe.toString());
         }
+        finally {
+            if (bos != null) {
+                try {
+                    bos.close();
+                } catch (IOException ioex) {}
+            }
+        }
     }
 
     /*