Can't restart Postgres

I inadvertently deleted the ssl-cert-snakeoil.pem out from under a running Postgres instance (9.4) which caused it to shut down. The last line of main.log:

FATAL: could not load server certificate file "/etc/ssl/certs/ssl-cert-snakeoil.pem": No such file or directory

I've since restored the cert but cannot get Postgres to start back up. It's the Debian 8 packaged version which complicates the debugging and troubleshooting. There doesn't seem to be a way to do anything with Postgres outsided the of Debian's systemd wrappers. All I've got to work with is from /var/syslog:

pangaea systemd[1]: Starting PostgreSQL Cluster 9.4-main...
pangaea postgresql(at)9(dot)4-main[28684]: Error: could not exec start -D /var/lib/postgresql/9.4/main -l /var/log/postgresql/postgresql-9.4-main.log -s -o -c config_file="/etc/postgresql/9.4/main/postgresql.conf" :
pangaea systemd[1]: postgresql(at)9(dot)4-main(dot)service: control process exited, code=exited status=1

Any help/advice would be greatly appreciated.

-Shawn