bash prepend and append content to a number of matching files

gistfile1.txt

#!/bin/bash
for f in $(find . -name "*.jsp")
do
	echo "Updating file: $f"
	#prepend: note BSD requires an empty '' param to sed -i
	sed -i  '' '1s/^/new line1\
new line2\
new line3\
/' $f

	#append trailing content
	echo "new line 4
new line5
new line6" >> $f

done