Bug 11437 jar packager: no error message but buttons disabled
20020314 on the 'jar manifest' wizard page, if you select to use existing manifest file there's no error message but next and finish are disabled user should be informed what to do to make the wizard happy
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarpackager/JarManifestWizardPage.java
private Button		fManifestFileBrowseButton;
	
	private Label		fSealingHeaderLabel;
	private Button		fSealJarRadioButton;
	private Label		fSealJarLabel;
	private Button		fSealedPackagesDetailsButton;
	private Button		fSealPackagesRadioButton;	
	private Label		fSealPackagesLabel;
	private Button		fUnSealedPackagesDetailsButton;
	
	private Label		fMainClassHeaderLabel;
	private Label		fMainClassLabel;
	private Text		fMainClassText;
	private Button		fMainClassBrowseButton;
	
	
	private final static String PAGE_NAME= "JarManifestWizardPage"; 
	
	
	private final static String STORE_GENERATE_MANIFEST= PAGE_NAME + ".GENERATE_MANIFEST"; 
	private final static String STORE_SAVE_MANIFEST= PAGE_NAME + ".SAVE_MANIFEST"; 
	private final static String STORE_REUSE_MANIFEST= PAGE_NAME + ".REUSE_MANIFEST"; 
	private final static String STORE_MANIFEST_LOCATION= PAGE_NAME + ".MANIFEST_LOCATION"; 
	
	
	private final static String STORE_SEAL_JAR= PAGE_NAME + ".SEAL_JAR"; 
	
	/**
	 *	Create an instance of this class
	 */