diff --git a/src/update/manager-base.hpp b/src/update/manager-base.hpp
index 0dddbd6..4d279c7 100644
--- a/src/update/manager-base.hpp
+++ b/src/update/manager-base.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2014-2017,  The University of Memphis,
+ * Copyright (c) 2014-2019,  The University of Memphis,
  *                           Regents of the University of California,
  *                           Arizona Board of Regents.
  *
@@ -44,6 +44,8 @@
 
 namespace update {
 
+enum { PREFIX_FLAG = 1 };
+
 class ManagerBase : boost::noncopyable
 {
 public:
@@ -107,6 +109,8 @@
                      Lsdb& lsdb,
                      const std::string& module);
 
+  virtual ~CommandManagerBase() {}
+
   /*! \brief add desired name prefix to the advertised name prefix list
    *         or insert a prefix into the FIB if parameters is valid.
    */
@@ -125,6 +129,18 @@
                           const ndn::mgmt::ControlParameters& parameters,
                           const ndn::mgmt::CommandContinuation& done);
 
+  /*! \brief save an advertised prefix to the nlsr configuration file
+   *         returns bool from the overridden function while nullopt here
+   */
+  virtual ndn::optional<bool>
+  afterAdvertise(const ndn::Name& prefix) { return ndn::nullopt; }
+
+  /*! \brief save an advertised prefix to the nlsr configuration file
+   *         returns bool from the overridden function while nullopt here
+   */
+  virtual ndn::optional<bool>
+  afterWithdraw(const ndn::Name& prefix) { return ndn::nullopt; }
+
 protected:
   NamePrefixList& m_namePrefixList;
   Lsdb& m_lsdb;