Bug 156322 Properties file without name should be forbidden to add to the resource folder
Steps to reproduce: 1.New a report, switch to Property Editor->Resources 2.Click "Add", add a properties file named ".properties" Expected result: This name is invalid Actual result: ".properties" is added to the resource folder but it can't be used in the report
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/resource/NewResourceFileDialog.java
{
		public IStatus validate( Object[] selection )
		{
			int nSelected = selection.length;
			if ( nSelected == 0 )
			{
				return ErrorStatusNoSelection;
			}
			else if ( nSelected > 1 )
			{
				return ErrorStatus;
			}
			else if ( selection[0] instanceof ResourceEntry
					&& ( (ResourceEntry) selection[0] ).isFile( ) )
			{
				return OKStatus;
			}
			else if ( newFileName == null
					|| !newFileName.toLowerCase( )