String dataDir = Utils.getSharedDataDir(AddChildNode.class) + "Notebook/";
// Load a OneNote Notebook
Notebook notebook = new Notebook(dataDir + "Notizbuch �ffnen.onetoc2");

// Append a new child to the Notebook
notebook.appendChild(new Document(dataDir + "Neuer Abschnitt 1.one"));

dataDir = dataDir + "AddChildNodetoOneNoteNotebook_out.onetoc2";

// Save the Notebook
notebook.save(dataDir);