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
l = element.getFolders(zipCurrentProvider);
                    } else {
                    	l = element.getFolders(tarCurrentProvider);
                    }
                    return l.getChildren(element);
                }
                return new Object[0];
            }
            public boolean hasChildren(Object o) {
                if (o instanceof MinimizedFileSystemElement) {
                    MinimizedFileSystemElement element = (MinimizedFileSystemElement) o;
                    if (element.isPopulated())
                        return getChildren(element).length > 0;
                    
                    return true;
                }
                return false;
            }
        };
    }
    /**
     *	Answer the string to display as the label for the source specification field
     */
    protected String getSourceLabel() {
        return DataTransferMessages.ArchiveImport_fromFile;
    }
    /**
     *	Answer a handle to the zip file currently specified as being the source.
     *	Return null if this file does not exist or is not of valid format.
     */