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/core/Module.java
/**
	 * The theme for the module.
	 */
	private ElementRefValue theme = null;
	/**
	 * The fatal exception found in the included modules, which will stop
	 * opening the outer-most module.
	 */
	protected Exception fatalException;
	/**
	 * The registered name manager of this module.
	 */
	protected INameManager nameManager = null;
	/**
	 * The registered API backward compatibility manager of this module.
	 */
	protected VersionControlMgr versionMgr = null;
	/**
	 * Options set for this module.
	 */
	protected ModuleOption options = null;
	/**
	 * Default constructor.
	 * 
	 * @param theSession
	 *            the session of the report
	 */
	protected Module( DesignSession theSession )
	{
		session = theSession;