diff --git a/internal/configuration/configuration.go b/internal/configuration/configuration.go
index ac29a01..be7bc59 100644
--- a/internal/configuration/configuration.go
+++ b/internal/configuration/configuration.go
@@ -29,16 +29,20 @@ func LoadConfiguration(path string) (*Configuration, error) {
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to open configuration file")
 	}
+	defer configFile.Close()
 
 	config := &Configuration{}
 
 	if err := yaml.NewDecoder(configFile).Decode(config); err != nil {
-		return nil, errors.Wrap(err, "failed to decode configuration file")
+		return nil, errors.Wrap(err, "failed to parse configuration file")
 	}
 
 	return config, nil
 }
 
+// SplitNetworkAddress splits ListenOn option and returns as two strings
+// network type (e.g. tcp, unix, udp) and address:port or /path/to/prog.socket
+// to listen on.
 func (c *Configuration) SplitNetworkAddress() (n string, a string) {
 	s := strings.Split(c.ListenOn, " ")
 	n, a = s[0], s[1]