v

.gometalinter

+{
+  "Exclude": ["exported \\w+ (\\S*['.]*)([a-zA-Z'.*]*) should have comment or be unexported"]
+}

core/database/database.go

-package models
+package database
 
 import (
 	"database/sql"
 	_ "github.com/go-sql-driver/mysql"
 )
 
-var db *sql.DB
+var DB *sql.DB
 
 func Init(dataSourceName string) error {
 
 	var err error
 
-	db, err = sql.Open("mysql", dataSourceName)
+	DB, err = sql.Open("mysql", dataSourceName)
 
 	if err != nil {
 		log.Panic(err)
 	}
 
-	if err = db.Ping(); err != nil {
+	if err = DB.Ping(); err != nil {
 		log.Panic(err)
 	}