Review

class PdfAnnotation {
    /**
     * Add some free text to the document.
     * @param writer
     * @param rect
     * @param contents
     * @param defaultAppearance
     * @return A PdfAnnotation
     */
    public static PdfAnnotation createFreeText(PdfWriter writer, Rectangle rect, String contents, PdfContentByte defaultAppearance) {
        PdfAnnotation annot = new PdfAnnotation(writer, rect);
        annot.put(PdfName.SUBTYPE, PdfName.FREETEXT);
        annot.put(PdfName.CONTENTS, new PdfString(contents, PdfObject.TEXT_UNICODE));
        annot.setDefaultAppearanceString(defaultAppearance);
        return annot;
    }

}