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
.endsWith( ext.toLowerCase( ) ) )
			{
				return ErrorStatus;
			}
			return OKStatus;
		}
	}
	public NewResourceFileDialog( )
	{
		super( true, new String[]{
			"*.properties" 
			} );
		setDoubleClickSelects( true );
		setValidator( new Validator( ) );
		setAllowMultiple( false );
		
		setTitle( Messages.getString( "ModulePage.Resourcefile.Dialog.Title" ) ); 
		setMessage( Messages.getString( "ModulePage.Resourcefile.Dialog.Message" ) ); 
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.dialogs.ElementTreeSelectionDialog#createDialogArea(org.eclipse.swt.widgets.Composite)
	 */
	protected Control createDialogArea( Composite parent )
	{
		Composite rt = (Composite) super.createDialogArea( parent );
		rt.setLayoutData( new GridData( GridData.FILL_BOTH ) );
		Composite pane = new Composite( rt, 0 );
		pane.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );