Bug 10593 Jar export should add ".jar" suffix if not specified
Build 20020228 - select some files - export them using the jar export - enter "test" as the jar name - it creates a jar file called "test" It should use "test.jar".
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarpackager/JarPackageWizardPage.java
void setSelectedElementsWithoutContainedChildren() {
		Set closure= removeContainedChildren(fInputGroup.getWhiteCheckedTreeItems());
		closure.addAll(getExportedNonContainers());
		fJarPackage.setSelectedElementsClosure(closure);
	}
	private Set removeContainedChildren(Set elements) {
		Set newList= new HashSet(elements.size());
		Set javaElementResources= getCorrespondingContainers(elements);
		Iterator iter= elements.iterator();
		boolean removedOne= false;
		while (iter.hasNext()) {
			Object element= iter.next();
			Object parent;
			if (element instanceof IResource)
				parent= ((IResource)element).getParent();
			else if (element instanceof IJavaElement) {
				parent= ((IJavaElement)element).getParent();
				if (parent instanceof IPackageFragmentRoot) {
					IPackageFragmentRoot pkgRoot= (IPackageFragmentRoot)parent;
					try {
						if (pkgRoot.getCorrespondingResource() instanceof IProject)
							parent= pkgRoot.getJavaProject();
					} catch (JavaModelException ex) {
						
					}
				}
			}
			else {
				
				newList.add(element);