Bug 36867 [Import/Export] Zip export dialog not append .zip if there is already an extension
Sometimes, when the Jar export dialog doesn't have the options I want, I use the zip export dialog to build a jar. Unfortunately, if I specify a file name of foo.jar, the zip export dialog insists on adding ".zip" to the end of the file name. Would it be possible to make it so ".zip" is not automatically added if there is already an extension on the file name (or specifically if ".jar" is there)? Or could there be a checkbox added on the export dialog to turn off the automatic appending of .zip?
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/wizards/datatransfer/WizardZipFileResourceExportPage1.java
List resourcesToExport = getWhiteCheckedResources();
		
		saveDirtyEditors();
		
		saveWidgetValues();
		if (resourcesToExport.size() > 0)
			return executeExportOperation(
				new ZipFileExportOperation(
					null,
					resourcesToExport,
					getDestinationValue()));
		MessageDialog.openInformation(getContainer().getShell(), DataTransferMessages.getString("DataTransfer.information"), 
		DataTransferMessages.getString("FileExport.noneSelected")); 
		return false;
	}
	/**
	 *	Answer the string to display in the receiver as the destination type
	 */
	protected String getDestinationLabel() {
		return DataTransferMessages.getString("ZipExport.destinationLabel"); 
	}
	/**
	 *	Answer the contents of self's destination specification widget.  If this
	 *	value does not have the required suffix then add it first.
	 */
	protected String getDestinationValue() {
		String requiredSuffix = getOutputSuffix();
		String destinationText = super.getDestinationValue();
		if (destinationText.length() != 0) {