return null;
return base;
	public BundleFile createBaseBundleFile(File basefile, BundleData bundledata) throws IOException {		BundleFile base = createBundleFile(basefile, bundledata);		if (System.getSecurityManager() == null || !supportSignedBundles)			return base;		try {			if (signedBundleSupport == null) {				String clazzName = System.getProperty(PROP_SIGNINGSUPPORT, DEFAULT_SIGNEDBUNDLE_SUPPORT);				signedBundleSupport = Class.forName(clazzName);			}			SignedBundle signedBundle = (SignedBundle) signedBundleSupport.newInstance();			signedBundle.setBundleFile(base);			return signedBundle;		} catch (ClassNotFoundException e) {			supportSignedBundles = false;		} catch (IllegalAccessException e) {			supportSignedBundles = false;		} catch (InstantiationException e) {			supportSignedBundles = false;		}		return null;	}