How to import NMS files on old paper version (1.7.10) like as in import-mc-dev.sh on new versions

[MateoN]

So i have cloned a Paper 1.7.10 repo: https://github.com/IPVP-MC/Paper-1.7, updated the dependencies, maven build is fine:

But now i would like to import files that aren't in the workspace (tho they are put and used in the final jar compilation) like EnumArmorMaterial.java, on new versions 1.15.x- 16.x we use import-mc-dev.sh like this

########################################################
########################################################
########################################################
#                   NMS IMPORTS
# Temporarily add new NMS dev imports here before you run paper patch
# but after you have paper rb'd your changes, remove the line from this file before committing.
# we do not need any lines added to this file for NMS

# import FileName
import Blocks
import Material
import Items
import EnumToolMaterial
import EnumArmorMaterial

But there isn't such thing in old 1.7 repo, how to do it please, thanks.