Bug 155509 ModuleHandle findResource method does not support .properties files
There is no fileType for .properties files in IResourceLocator
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/DefaultResourceLocator.java
return null;
		}
		finally
		{
			if ( in != null )
				try
				{
					in.close( );
				}
				catch ( IOException e )
				{
				}
		}
		return url;
	}
	/**
	 * Returns the url of resource which is in corresponding bundle.
	 * 
	 * @param moduleHandle
	 *            module in which the bundle symbolic name is cached
	 * @param fileName
	 *            the relative file name
	 * @return the url of resource if found
	 */
	private URL tryFragmentSearch( String fileName )
	{
		return BundleFactory.getBundleFactory( ).getBundleResource(
				FRAGMENT_RESOURCE_HOST, fileName );
	}
}