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/ModuleHandle.java
*/
	public ThemeHandle getTheme( )
	{
		Theme theme = getModule( ).getTheme( module );
		if ( theme == null )
			return null;
		return (ThemeHandle) theme.getHandle( theme.getRoot( ) );
	}
	/**
	 * Sets the theme to a report.
	 * 
	 * @param theme
	 *            the theme instance
	 * @throws SemanticException
	 */
	public void setTheme( ThemeHandle theme ) throws SemanticException
	{
		ThemeCommand command = new ThemeCommand( (Module) getElement( ) );
		command.setThemeElement( theme );
	}
	/**
	 * Gets the location information of the module.
	 * 
	 * @return the location information of the module
	 */
	String getLocation( )
	{
		return getModule( ).getLocation( );
	}
	/**