A PDF or Word document contains unstructured data, and cannot be imported into tables directly, unlike an Excel for example. Looks like you would like to copy the text from the document and save it as a string in your database? There are API's out there that try to provide the functionality you are after, so perhaps that's something you could try?
Else you could store the entire document in a fileDocument entity and show the document itself in your app. for instance by using the documentviewer widget.