open my $filehandle, ">", $file

##</code><code>##

open my $filehandle, $file 
  or die "can't open $file: $!";

##</code><code>##

$ perl -e 'use warnings; use strict; my $filename = "/tmp/hey"; open my $file, $filename'
$ perl -e 'use warnings; use strict; my $filename = "/tmp/hey"; open my $file, $filename;'
Parentheses missing around "my" list at -e line 1.