case $operatingsystem {
        "CentOS": {
                        $file1 = "/tmp/centos1"
                        $file2 = "/tmp/centos2"
                }
        "debian": {
                        $file1 = "/tmp/debian1"
                        $file2 = "/tmp/debian2"
                }
}

file{[ $file1, $file2]:
        ensure => present
}