code simplify for package logs

@@ -43,11 +43,7 @@ func NewConn() LoggerInterface {
 // init connection writer with json config.
 // json config only need key "level".
 func (c *ConnWriter) Init(jsonconfig string) error {
-	err := json.Unmarshal([]byte(jsonconfig), c)
-	if err != nil {
-		return err
-	}
-	return nil
+	return json.Unmarshal([]byte(jsonconfig), c)
 }
 
 // write message in connection.
@@ -77,10 +73,9 @@ func (c *ConnWriter) Flush() {
 
 // destroy connection writer and close tcp listener.
 func (c *ConnWriter) Destroy() {
-	if c.innerWriter == nil {
-		return
-	}
+	if c.innerWriter != nil {
 		c.innerWriter.Close()
+	}
 }
 
 func (c *ConnWriter) connect() error {

@@ -50,9 +50,10 @@ type ConsoleWriter struct {
 
 // create ConsoleWriter returning as LoggerInterface.
 func NewConsole() LoggerInterface {
-	cw := new(ConsoleWriter)
-	cw.lg = log.New(os.Stdout, "", log.Ldate|log.Ltime)
-	cw.Level = LevelDebug
+	cw := &ConsoleWriter{
+		lg:    log.New(os.Stdout, "", log.Ldate|log.Ltime),
+		Level: LevelDebug,
+	}
 	return cw
 }
 
@@ -62,11 +63,7 @@ func (c *ConsoleWriter) Init(jsonconfig string) error {
 	if len(jsonconfig) == 0 {
 		return nil
 	}
-	err := json.Unmarshal([]byte(jsonconfig), c)
-	if err != nil {
-		return err
-	}
-	return nil
+	return json.Unmarshal([]byte(jsonconfig), c)
 }
 
 // write message in console.
@@ -76,9 +73,10 @@ func (c *ConsoleWriter) WriteMsg(msg string, level int) error {
 	}
 	if goos := runtime.GOOS; goos == "windows" {
 		c.lg.Println(msg)
-	} else {
-		c.lg.Println(colors[level](msg))
+		return nil
 	}
+	c.lg.Println(colors[level](msg))
+
 	return nil
 }
 

@@ -123,11 +123,7 @@ func (w *FileLogWriter) startLogger() error {
 		return err
 	}
 	w.mw.SetFd(fd)
-	err = w.initFd()
-	if err != nil {
-		return err
-	}
-	return nil
+	return w.initFd()
 }
 
 func (w *FileLogWriter) docheck(size int) {
@@ -170,14 +166,13 @@ func (w *FileLogWriter) initFd() error {
 	}
 	w.maxsize_cursize = int(finfo.Size())
 	w.daily_opendate = time.Now().Day()
+	w.maxlines_curlines = 0
 	if finfo.Size() > 0 {
 		count, err := w.lines()
 		if err != nil {
 			return err
 		}
 		w.maxlines_curlines = count
-	} else {
-		w.maxlines_curlines = 0
 	}
 	return nil
 }

@@ -292,9 +292,9 @@ func (bl *BeeLogger) Close() {
 					fmt.Println("ERROR, unable to WriteMsg (while closing logger):", err)
 				}
 			}
-		} else {
-			break
+			continue
 		}
+		break
 	}
 	for _, l := range bl.outputs {
 		l.Flush()

@@ -25,7 +25,8 @@ import (
 )
 
 const (
-	subjectPhrase = "Diagnostic message from server"
+// no usage
+// subjectPhrase = "Diagnostic message from server"
 )
 
 // smtpWriter implements LoggerInterface and is used to send emails via given SMTP-server.
@@ -146,9 +147,7 @@ func (s *SmtpWriter) WriteMsg(msg string, level int) error {
 	mailmsg := []byte("To: " + strings.Join(s.RecipientAddresses, ";") + "\r\nFrom: " + s.FromAddress + "<" + s.FromAddress +
 		">\r\nSubject: " + s.Subject + "\r\n" + content_type + "\r\n\r\n" + fmt.Sprintf(".%s", time.Now().Format("2006-01-02 15:04:05")) + msg)
 
-	err := s.sendMail(s.Host, auth, s.FromAddress, s.RecipientAddresses, mailmsg)
-
-	return err
+	return s.sendMail(s.Host, auth, s.FromAddress, s.RecipientAddresses, mailmsg)
 }
 
 // implementing method. empty.