Bug 33897 [Import/Export] Export to .tar.gz or .tar.bz2
Right click a Java project. Choose "Export...". A window opens where you can choose between different export targets. There is no ".tar.gz" target or ".tar.bz2". I would like to have either one (or both). If I must choose one, I prefer ".tar.bz2", but I don't really have a strong opinion about it; ".tar.gz" would be fine as well. The reason I somewhat prefer bzip2 is that bzip2 makes files noticably smaller than gzip, and my impression is that gzip is slowly being outcompeted. A Linux-GTK implementation would be good enough for me, but it is possible that "Unix All" would be a better platform as other Unix users could probably be interested in this as well.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardZipFileImportPage1.java
if (providerCache != null) {
            closeZipFile(providerCache.getZipFile());
            providerCache = null;
        }
    }
    /**
     * Attempts to close the passed zip file, and answers a boolean indicating success.
     */
    protected boolean closeZipFile(ZipFile file) {
        try {
            file.close();
        } catch (IOException e) {
            displayErrorDialog(DataTransferMessages.format(
                    "ZipImport.couldNotClose", new Object[] { file.getName() })); 
            return false;
        }
        return true;
    }
    /**
     *	Create the import options specification widgets.
     */
    protected void createOptionsGroup(Composite parent) {
        
        Composite optionsGroup = new Composite(parent, SWT.NONE);
        GridLayout layout = new GridLayout();
        layout.marginHeight = 0;
        optionsGroup.setLayout(layout);
        optionsGroup.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL
                | GridData.GRAB_HORIZONTAL));