this is the first line
and this the second
here is another
and another
does it ever end
maybe

FIRST action: insert ` as first character so it becomes:

`this is the first line
`and this the second
`here is another
`and another
`does it ever end
`maybe

SECOND action: replace ` with type nul > so it becomes:

type nul > "this is the first line
type nul > "and this the second
type nul > "here is another
type nul > "and another
type nul > "does it ever end
type nul > "maybe

THIRD action: add .txt at the end of each line so it becomes:

type nul > "this is the first line.txt"
type nul > "and this the second.txt"
type nul > "here is another.txt"
type nul > "and another.txt"
type nul > "does it ever end.txt"
type nul > "maybe.txt"

Save a batch file, for instance doit.bat

Open a command prompt and run doit.bat

Finished.