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
protected boolean validateOptionsGroup() {
		return true;
	}
	/*
	 * Overrides method from WizardDataTransferPage
	 */
	protected boolean validateSourceGroup() {
		if (!fExportClassFilesCheckbox.getSelection()
				&& !fExportJavaFilesCheckbox.getSelection()) {
			setErrorMessage(JarPackagerMessages.getString("JarPackageWizardPage.error.noExportTypeChecked")); 
			return false;
		}
		if (getSelectedResources().size() == 0) 
			return false;
		
		if (fExportClassFilesCheckbox.getSelection() || !fExportJavaFilesCheckbox.getSelection())
			return true;
			
		
		Iterator iter= getSelectedResourcesIterator();
		while (iter.hasNext()) {
			if (!(iter.next() instanceof IClassFile))
				return true;
		}
		return false;
	}
	/*
	 * Overwrides method from WizardExportPage
	 */
	protected IPath getResourcePath() {