Bug 8476 JAR Packager: Make main class field editable
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarpackager/JarManifestWizardPage.java
pathStr= ""; 
			fJarPackage.setManifestLocation(new Path(pathStr));
			
			fJarPackage.setSealJar(settings.getBoolean(STORE_SEAL_JAR));
		}
	}
	/**
	 *	Stores the widget values in the JAR package.
	 */
	protected void updateModel() {
		if (getControl() == null)
			return;
		
		
		fJarPackage.setGenerateManifest(fGenerateManifestRadioButton.getSelection());
		fJarPackage.setSaveManifest(fSaveManifestCheckbox.getSelection());
		fJarPackage.setReuseManifest(fReuseManifestCheckbox.getSelection());
		String path;
		if (fJarPackage.isManifestGenerated())
			path= fNewManifestFileText.getText();
		else
			path= fManifestFileText.getText();
		if (path == null)
			path= ""; 
		fJarPackage.setManifestLocation(new Path(path));
		
		fJarPackage.setSealJar(fSealJarRadioButton.getSelection());
	}
	/**
	 * Determine if the page is complete and update the page appropriately.