PdfStamper

I have a normal PDF file, I want to insert blank pages at the end of this PDF using iText, without changing the existing PDF contents
In this example, we use ColumnText to add page numbers to an existing PDF document.
These examples were written in answer to questions such as: How to remove text from a PDF?
These examples were written in answer to questions such as: How do I add XMP metadata to each page of an existing PDF?
These examples were written in answer to a question on Stack Overflow regarding stamping content on an existing document.