diff --git a/internal/cmd/root.go b/internal/cmd/root.go
index 623acb1..e77d04d 100644
--- a/internal/cmd/root.go
+++ b/internal/cmd/root.go
@@ -101,28 +101,39 @@ func getDataDir(portableMode bool) (string, error) {
 }
 
 func openDatabase() (database.DB, error) {
-	// Check if it uses MySQL
-	if dbms, _ := os.LookupEnv("SHIORI_DBMS"); dbms == "mysql" {
-		user, _ := os.LookupEnv("SHIORI_MYSQL_USER")
-		password, _ := os.LookupEnv("SHIORI_MYSQL_PASS")
-		dbName, _ := os.LookupEnv("SHIORI_MYSQL_NAME")
-		dbAddress, _ := os.LookupEnv("SHIORI_MYSQL_ADDRESS")
-
-		connString := fmt.Sprintf("%s:%s@%s/%s", user, password, dbAddress, dbName)
-		return database.OpenMySQLDatabase(connString)
+	switch dbms, _ := os.LookupEnv("SHIORI_DBMS"); dbms {
+	case "mysql":
+		return openMySQLDatabase()
+	case "postgresql":
+		return openPostgreSQLDatabase()
+	default:
+		return openSQLiteDatabase()
 	}
-	// Check if it uses PostgreSQL
-	if dbms, _ := os.LookupEnv("SHIORI_DBMS"); dbms == "postgresql" {
-		host, _ := os.LookupEnv("SHIORI_PG_HOST")
-		port, _ := os.LookupEnv("SHIORI_PG_PORT")
-		user, _ := os.LookupEnv("SHIORI_PG_USER")
-		password, _ := os.LookupEnv("SHIORI_PG_PASS")
-		dbName, _ := os.LookupEnv("SHIORI_PG_NAME")
+}
 
-		connString := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable", host, port, user, password, dbName)
-		return database.OpenPGDatabase(connString)
-	}
-	// If not, just uses SQLite
+func openSQLiteDatabase() (database.DB, error) {
 	dbPath := fp.Join(dataDir, "shiori.db")
 	return database.OpenSQLiteDatabase(dbPath)
 }
+
+func openMySQLDatabase() (database.DB, error) {
+	user, _ := os.LookupEnv("SHIORI_MYSQL_USER")
+	password, _ := os.LookupEnv("SHIORI_MYSQL_PASS")
+	dbName, _ := os.LookupEnv("SHIORI_MYSQL_NAME")
+	dbAddress, _ := os.LookupEnv("SHIORI_MYSQL_ADDRESS")
+
+	connString := fmt.Sprintf("%s:%s@%s/%s", user, password, dbAddress, dbName)
+	return database.OpenMySQLDatabase(connString)
+}
+
+func openPostgreSQLDatabase() (database.DB, error) {
+	host, _ := os.LookupEnv("SHIORI_PG_HOST")
+	port, _ := os.LookupEnv("SHIORI_PG_PORT")
+	user, _ := os.LookupEnv("SHIORI_PG_USER")
+	password, _ := os.LookupEnv("SHIORI_PG_PASS")
+	dbName, _ := os.LookupEnv("SHIORI_PG_NAME")
+
+	connString := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable",
+		host, port, user, password, dbName)
+	return database.OpenPGDatabase(connString)
+}