diff --git a/src/db/db-mgr.cpp b/src/db/db-mgr.cpp
index 5ab9db1..baabad8 100644
--- a/src/db/db-mgr.cpp
+++ b/src/db/db-mgr.cpp
@@ -26,25 +26,22 @@
 namespace ndns {
 
 DBMgr::DBMgr()
-: m_dbfile("src/db/ndns-local.db")
-, m_conn(0)
-, m_reCode(-1)
-, m_status(DBClosed)
-, m_resultNum(0)
+  : m_dbfile("src/db/ndns-local.db")
+  , m_conn(0)
+  , m_reCode(-1)
+  , m_status(DBClosed)
+  , m_resultNum(0)
 {
   std::fstream file;
-  file.open(m_dbfile,std::ios::in);
-  if (file)
-  {
-    std::cout<<"database file "<<m_dbfile<<" does exist"<<std::endl;
-  } else
-  {
-    std::cout<<"database file "<<m_dbfile<<" does not exist"<<std::endl;
+  file.open(m_dbfile, std::ios::in);
+  if (file) {
+    std::cout << "database file " << m_dbfile << " does exist" << std::endl;
+  } else {
+    std::cout << "database file " << m_dbfile << " does not exist" << std::endl;
   }
 
 }
 
-
 DBMgr::~DBMgr()
 {
 }
@@ -55,14 +52,12 @@
     return;
 
   m_reCode = sqlite3_open(this->m_dbfile.c_str(), &(this->m_conn));
-  if (m_reCode != SQLITE_OK)
-  {
-    m_err = "Cannot connect to the db: "+this->m_dbfile;
+  if (m_reCode != SQLITE_OK) {
+    m_err = "Cannot connect to the db: " + this->m_dbfile;
     m_status = DBError;
     //exit(1);
-  }else
-  {
-    std::cout<<"connect to the db: "<<m_dbfile<<std::endl;
+  } else {
+    std::cout << "connect to the db: " << m_dbfile << std::endl;
   }
   m_status = DBConnected;
 }
@@ -73,15 +68,15 @@
     return;
 
   m_reCode = sqlite3_close(this->m_conn);
-  if (m_reCode != SQLITE_OK)
-  {
-        m_err = "Cannot close the db: "+this->m_dbfile;
-        m_status = DBError;
+  if (m_reCode != SQLITE_OK) {
+    m_err = "Cannot close the db: " + this->m_dbfile;
+    m_status = DBError;
   }
   m_status = DBClosed;
 }
 
-void DBMgr::execute(std::string sql, int (*callback)(void*,int,char**,char**), void * paras)
+void DBMgr::execute(std::string sql,
+    int (*callback)(void*, int, char**, char**), void * paras)
 {
   if (m_status == DBClosed)
     this->open();
@@ -89,15 +84,14 @@
   clearResultNum();
   char *err_msg;
   m_reCode = sqlite3_exec(m_conn, sql.c_str(), callback, paras, &err_msg);
-  if (m_reCode != SQLITE_OK)
-  {
+  if (m_reCode != SQLITE_OK) {
     m_status = DBError;
     this->m_err.append(err_msg);
-    std::cout<<this->m_err<<std::endl;
+    std::cout << this->m_err << std::endl;
   }
   this->close();
 }
 
-}//namespace ndns
-}//namespace ndn
+} //namespace ndns
+} //namespace ndn