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/WizardFileSystemResourceExportPage1.java
*/
    protected boolean ensureTargetIsValid(File targetDirectory) {
        if (targetDirectory.exists() && !targetDirectory.isDirectory()) {
            displayErrorDialog(DataTransferMessages
                    .getString("FileExport.directoryExists")); 
            giveFocusToDestination();
            return false;
        }
        return ensureDirectoryExists(targetDirectory);
    }
    /**
     *  Set up and execute the passed Operation.  Answer a boolean indicating success.
     *
     *  @return boolean
     */
    protected boolean executeExportOperation(FileSystemExportOperation op) {
        op.setCreateLeadupStructure(createDirectoryStructureButton
                .getSelection());
        op.setOverwriteFiles(overwriteExistingFilesCheckbox.getSelection());
        try {
            getContainer().run(true, true, op);
        } catch (InterruptedException e) {
            return false;
        } catch (InvocationTargetException e) {
            displayErrorDialog(e.getTargetException());
            return false;
        }
        IStatus status = op.getStatus();
        if (!status.isOK()) {
            ErrorDialog.openError(getContainer().getShell(),