/**
  * Adds a new source container specified by the container name to the source path of the specified
  * project
  *
  * @param jproject
  * @param containerName
  * @return the package fragment root of the container name
  * @throws CoreException
  */
 public static IPackageFragmentRoot addSourceContainer(IJavaProject jproject, String containerName)
     throws CoreException {
   IProject project = jproject.getProject();
   IPackageFragmentRoot root =
       jproject.getPackageFragmentRoot(addFolderToProject(project, containerName));
   IClasspathEntry cpe = JavaCore.newSourceEntry(root.getPath());
   addToClasspath(jproject, cpe);
   return root;
 }
 /**
  * Adds a container entry to the specified java project
  *
  * @param project
  * @param container
  * @throws JavaModelException
  */
 public static void addContainerEntry(IJavaProject project, IPath container)
     throws JavaModelException {
   IClasspathEntry cpe = JavaCore.newContainerEntry(container, false);
   addToClasspath(project, cpe);
 }