Bug 97523 [Import/Export] Get overwrite prompt before no resources selected prompt
3.1 RC1 - File > Export > Archive - clear any selected resources - enter an archive file name where the file already exists - Finish - it prompts to overwrite the file; choose Yes - it says "There are no resources currently selected for export" (OK) Should get the "no resources" prompt first, and not bother with the second one. Should check the other export wizards too.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardArchiveFileResourceImportPage1.java
if (o instanceof MinimizedFileSystemElement) {
                    MinimizedFileSystemElement element = (MinimizedFileSystemElement) o;
                    AdaptableList l;
                    if(zipCurrentProvider != null) {
                    	l = element.getFiles(zipCurrentProvider);
                    } else {
                    	l = element.getFiles(tarCurrentProvider);
                    }
                    return l.getChildren(element);
                }
                return new Object[0];
            }
        };
    }
    /**
     *	Answer the root FileSystemElement that represents the contents of the
     *	currently-specified .zip file.  If this FileSystemElement is not
     *	currently defined then create and return it.
     */
    protected MinimizedFileSystemElement getFileSystemTree() {
    	if(ArchiveFileManipulations.isTarFile(sourceNameField.getText())) {    		
        	TarFile sourceTarFile = getSpecifiedTarSourceFile();
        	if (sourceTarFile == null) {
                
                this.zipCurrentProvider = null;
                this.tarCurrentProvider = null;
                return null;
        	}
	
            TarLeveledStructureProvider provider = ArchiveFileManipulations