setBuildIfNeeded(true);
	public JarPackage() {		setIsUsedToInitialize(false);		setExportClassFiles(true);		setUseSourceFolderHierarchy(false);		setCompress(true);		setSaveDescription(false);		setJarLocation(new Path("")); //$NON-NLS-1$		setDescriptionLocation(new Path("")); //$NON-NLS-1$		setUsesManifest(true);		setGenerateManifest(true);		setReuseManifest(false);		setSaveManifest(false);		setManifestLocation(new Path("")); //$NON-NLS-1$		setDownloadExtensionsPath(""); //$NON-NLS-1$		setExportErrors(true);		setExportWarnings(true);				setLogErrors(true);		setLogWarnings(true);		fManifestProvider= new ManifestProvider();	}