diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/extension/ExtensionUtil.java b/src/main/org/apache/tools/ant/taskdefs/optional/extension/ExtensionUtil.java
index 6acab9433..22d1576bc 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/extension/ExtensionUtil.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/extension/ExtensionUtil.java
@@ -54,9 +54,11 @@
 package org.apache.tools.ant.taskdefs.optional.extension;
 
 import java.io.File;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.jar.JarFile;
+import java.util.jar.Manifest;
 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.DirectoryScanner;
 import org.apache.tools.ant.Project;
@@ -235,4 +237,26 @@ public class ExtensionUtil
 
         extensionList.add( extension );
     }
+
+    /**
+     * retrieve manifest for specified file.
+     *
+     * @param file the file
+     * @return the manifest
+     * @throws BuildException if errror occurs (file not exist,
+     *         file not a jar, manifest not exist in file)
+     */
+    static Manifest getManifest( final File file )
+        throws BuildException
+    {
+        try
+        {
+            final JarFile jarFile = new JarFile( file );
+            return jarFile.getManifest();
+        }
+        catch( final IOException ioe )
+        {
+            throw new BuildException( ioe.getMessage(), ioe );
+        }
+    }
 }
diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/extension/LibraryDisplayer.java b/src/main/org/apache/tools/ant/taskdefs/optional/extension/LibraryDisplayer.java
index 141bcdeb1..6077658b1 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/extension/LibraryDisplayer.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/extension/LibraryDisplayer.java
@@ -54,9 +54,7 @@
 package org.apache.tools.ant.taskdefs.optional.extension;
 
 import java.io.File;
-import java.io.IOException;
 import java.text.ParseException;
-import java.util.jar.JarFile;
 import java.util.jar.Manifest;
 import org.apache.tools.ant.BuildException;
 
@@ -80,7 +78,7 @@ class LibraryDisplayer
     void displayLibrary( final File file )
         throws BuildException
     {
-        final Manifest manifest = getManifest( file );
+        final Manifest manifest = ExtensionUtil.getManifest( file );
         displayLibrary( file, manifest );
     }
 
@@ -209,26 +207,4 @@ class LibraryDisplayer
         }
         System.out.println( specification.toString() );
     }
-
-    /**
-     * retrieve manifest for specified file.
-     *
-     * @param file the file
-     * @return the manifest
-     * @throws BuildException if errror occurs (file not exist,
-     *         file not a jar, manifest not exist in file)
-     */
-    private Manifest getManifest( final File file )
-        throws BuildException
-    {
-        try
-        {
-            final JarFile jarFile = new JarFile( file );
-            return jarFile.getManifest();
-        }
-        catch( final IOException ioe )
-        {
-            throw new BuildException( ioe.getMessage(), ioe );
-        }
-    }
 }