Javadoc: Add missing comments

Author: garydgregory

commons-vfs2-jackrabbit1/src/main/java/org/apache/commons/vfs2/provider/webdav/WebdavFileContentInfoFactory.java

@@ -35,6 +35,13 @@
  */
 public class WebdavFileContentInfoFactory implements FileContentInfoFactory {
 
+    /**
+     * Constructs a new instance.
+     */
+    public WebdavFileContentInfoFactory() {
+        // empty
+    }
+
     @Override
     public FileContentInfo create(final FileContent fileContent) throws FileSystemException {
         final WebdavFileObject file = (WebdavFileObject) FileObjectUtils.getAbstractFileObject(fileContent.getFile());