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
return;
		
		if ( element.getRoot( ) != this )
			return;
		IElementDefn defn = element.getDefn( );
		if ( isAdd )
		{
			
			if ( element.getID( ) <= NO_ID
					|| ( getElementByID( element.getID( ) ) != null && getElementByID( element
							.getID( ) ) != element ) )
			{
				element.setID( getNextID( ) );
				assert getElementByID( element.getID( ) ) == null;
			}
			if ( getElementByID( element.getID( ) ) == null )
				addElementID( element );
		}
		else
		{
			dropElementID( element );
		}
		for ( int i = 0; i < defn.getSlotCount( ); i++ )
		{
			ContainerSlot slot = element.getSlot( i );
			if ( slot == null )
				continue;
			for ( int pos = 0; pos < slot.getCount( ); pos++ )
			{
				DesignElement innerElement = slot.getContent( pos );