Bug 83369 [Import/Export] Unused manifest file generation code in ZipFileExporter
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/ArchiveFileExportOperation.java
int totalWork = IProgressMonitor.UNKNOWN;
            try {
                if (resourcesToExport == null)
                    totalWork = countChildrenOf(resource);
                else
                    totalWork = countSelectedResources();
            } catch (CoreException e) {
                
            }
            monitor.beginTask(DataTransferMessages
                    .getString("DataTransfer.exportingTitle"), totalWork); 
            if (resourcesToExport == null) {
                exportResource(resource);
            } else {
                
                exportSpecifiedResources();
            }
            try {
                exporter.finished();
            } catch (IOException e) {
                throw new InvocationTargetException(
                        e,
                        DataTransferMessages
                                .format(
                                        "ZipExport.cannotClose", new Object[] { e.getMessage() })); 
            }
        } finally {
            monitor.done();
        }