JAXB: 1 counts of IllegalAnnotationExceptions

[fermat]

ciao!

mi stavo studiando un pò jaxb, e volevo esportare una jtable in xml.
questo il model:

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "book")
public class BookModel {

    private int id;
    private String title;
    private String author;
    private String editor;
    private String isbn;
    private double price;
    private String note;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public String getEditor() {
        return editor;
    }

    public void setEditor(String editor) {
        this.editor = editor;
    }

    public String getIsbn() {
        return isbn;
    }

    public void setIsbn(String isbn) {
        this.isbn = isbn;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public String getNote() {
        return note;
    }

    public void setNote(String note) {
        this.note = note;
    }
}

poi ho creato una classe per settare la lista dei libri:

@XmlRootElement(name = "books")
public class ListBooks {

    @XmlElementWrapper(name = "bookList")
    ArrayList<BookModel> bookList;

    public void setBookList(ArrayList<BookModel> bookList) {
        this.bookList = bookList;
    }

    public ArrayList<BookModel> getBookList() {
        return bookList;
    }
}

infine lancio tutto così:

public class ExportXml {
    
    public void createXml(JTable table, File file) throws JAXBException {
        ArrayList<BookModel> bookList = new ArrayList<>();
        for (int row = 0; row < table.getRowCount(); row++) {
            BookModel bookModel = new BookModel();
            for (int column = 0; column < table.getColumnCount(); column++) {
                bookModel.setId(Integer.parseInt(table.getValueAt(row, 0).toString()));
                bookModel.setTitle(table.getValueAt(row, 1).toString());
                bookModel.setAuthor(table.getValueAt(row, 2).toString());
                bookModel.setEditor(table.getValueAt(row, 3).toString());
                bookModel.setPrice(Double.parseDouble(table.getValueAt(row, 4).toString()));
                bookModel.setIsbn(table.getValueAt(row, 5).toString());
                bookModel.setNote(table.getValueAt(row, 6).toString());
            }
            bookList.add(bookModel);
        }
        ListBooks books = new ListBooks();
        books.setBookList(bookList);
        JAXBContext context = JAXBContext.newInstance(ListBooks.class);
        Marshaller m = context.createMarshaller();
        m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
        m.marshal(books, file);
    }
}

il problema è che ottengo questa eccezione:

1 counts of IllegalAnnotationExceptions

ma non riesco a capire dove sto sbagliando.
qualche idea??