diff --git a/steward/backend/mysql/mysql_storage.go b/steward/backend/mysql/mysql_storage.go
deleted file mode 100644
index bbcf7ab..0000000
--- a/steward/backend/mysql/mysql_storage.go
+++ /dev/null
@@ -1,79 +0,0 @@
-package mysql
-
-import (
-	"database/sql"
-
-	_ "github.com/go-sql-driver/mysql"
-	"github.com/localhots/steward/steward"
-)
-
-type (
-	MysqlStorage struct {
-		db         *sql.DB
-		importStmt *sql.Stmt
-	}
-)
-
-const (
-	importQuery = "" +
-		"replace into contributions (author, repo, week, commits, additions, deletions) " +
-		"values (?, ?, ?, ?, ?, ?)"
-)
-
-func New(host, user, pass, db string) *MysqlStorage {
-	var (
-		s           = &MysqlStorage{}
-		err         error
-		databaseURI = makeDatabaseURI(host, user, pass, db)
-	)
-
-	if s.db, err = sql.Open("mysql", databaseURI); err != nil {
-		panic(err)
-	}
-	if s.importStmt, err = s.db.Prepare(importQuery); err != nil {
-		panic(err)
-	}
-
-	return s
-}
-
-func (ms *MysqlStorage) ImportContributions(contrib []*steward.Contribution) {
-	for _, c := range contrib {
-		if _, err := ms.importStmt.Exec(
-			c.Author,
-			c.Repo,
-			c.Week,
-			c.Commits,
-			c.Additions,
-			c.Deletions,
-		); err != nil {
-			panic(err)
-		}
-	}
-}
-
-func makeDatabaseURI(host, user, pass, db string) string {
-	var (
-		databaseURI string
-	)
-
-	if user == "" && pass != "" {
-		panic("Password is set but no is user specified")
-	}
-
-	if user != "" {
-		databaseURI += user
-	}
-	if pass != "" {
-		databaseURI += ":" + pass
-	}
-	if user != "" {
-		databaseURI += "@"
-	}
-	if host != "" {
-		databaseURI += host
-	}
-	databaseURI += "/" + db + "?parseTime=true"
-
-	return databaseURI
-}
diff --git a/steward/backend/mysql/storage.go b/steward/backend/mysql/storage.go
new file mode 100644
index 0000000..b5e54af
--- /dev/null
+++ b/steward/backend/mysql/storage.go
@@ -0,0 +1,85 @@
+package mysql
+
+import (
+	"database/sql"
+	"strconv"
+
+	_ "github.com/go-sql-driver/mysql"
+	"github.com/localhots/steward/steward"
+)
+
+type (
+	Config struct {
+		Hostname string
+		Port     int
+		Username string
+		Password string
+		Database string
+	}
+	Storage struct {
+		db         *sql.DB
+		importStmt *sql.Stmt
+	}
+)
+
+const (
+	importQuery = "" +
+		"replace into contributions (author, repo, week, commits, additions, deletions) " +
+		"values (?, ?, ?, ?, ?, ?)"
+)
+
+func New(c *Config) *Storage {
+	var (
+		s   = &Storage{}
+		err error
+	)
+
+	if s.db, err = sql.Open("mysql", c.URI()); err != nil {
+		panic(err)
+	}
+	if s.importStmt, err = s.db.Prepare(importQuery); err != nil {
+		panic(err)
+	}
+
+	return s
+}
+
+func (s *Storage) ImportContributions(contrib []*steward.Contribution) {
+	for _, c := range contrib {
+		if _, err := s.importStmt.Exec(
+			c.Author,
+			c.Repo,
+			c.Week,
+			c.Commits,
+			c.Additions,
+			c.Deletions,
+		); err != nil {
+			panic(err)
+		}
+	}
+}
+
+func (c *Config) URI() (uri string) {
+	if c.Username == "" && c.Password != "" {
+		panic("Password is set but no username specified")
+	}
+
+	if c.Username != "" {
+		uri += c.Username
+	}
+	if c.Password != "" {
+		uri += ":" + c.Password
+	}
+	if c.Username != "" {
+		uri += "@"
+	}
+	if c.Hostname != "" {
+		uri += c.Hostname
+	}
+	if c.Port != 0 {
+		uri += ":" + strconv.Itoa(c.Port)
+	}
+	uri += "/" + c.Database + "?parseTime=true"
+
+	return
+}