List or Document Library organize issue

Hi Team,

I have documents stored in the file system like this 

ex: C:\SharePointFolder\ ..... (which has sharepoint related documents)

       C: \Java\... (Java related documents)

       C:\Oracle\ (Oracle related documents)

My requirement is need to create a List which should take all the documents from the above location and should organize like below 

SharePoint (folder) -- (under this share point related documents should upload)

Java (Folder)----(under this Java  related documents should upload)

Oracle (Folder)---(under this Oracle  related documents should upload)

And 

If the share point user added any document to the list that should go under SharePoint folder only in the same way New Oracle and Java files should store under respected folder only how can i achieve this?

Thanks,

Kiran