diff --git a/helper/ccnb-parser/syntax-tree/ccnb-parser-base-tag.h b/helper/ccnb-parser/syntax-tree/ccnb-parser-base-tag.h
index 604ebce..15310a5 100644
--- a/helper/ccnb-parser/syntax-tree/ccnb-parser-base-tag.h
+++ b/helper/ccnb-parser/syntax-tree/ccnb-parser-base-tag.h
@@ -39,9 +39,6 @@
 public:
   std::list<Ptr<Block> > m_attrs;      ///< \brief List of attributes, associated with this tag
   std::list<Ptr<Block> > m_nestedTags; ///< \brief List of nested tags
-
-public:
-  virtual ~BaseTag () { }
   
 protected:
   /**
diff --git a/helper/ccnb-parser/syntax-tree/ccnb-parser-block.cc b/helper/ccnb-parser/syntax-tree/ccnb-parser-block.cc
index 09bf96a..29e3fac 100644
--- a/helper/ccnb-parser/syntax-tree/ccnb-parser-block.cc
+++ b/helper/ccnb-parser/syntax-tree/ccnb-parser-block.cc
@@ -44,8 +44,6 @@
 
 Ptr<Block> Block::ParseBlock (Buffer::Iterator &start)
 {
-  NS_LOG_DEBUG (">");
-
   // std::cout << "<< pos: " << counter << "\n";
   uint32_t value = 0;
 
@@ -91,7 +89,6 @@
 
 Block::~Block ()
 {
-  NS_LOG_DEBUG ("<");
 }
 
 }
diff --git a/helper/ccnb-parser/visitors/ccnb-parser-no-argu-visitor.h b/helper/ccnb-parser/visitors/ccnb-parser-no-argu-visitor.h
index 6f6bcc2..ce3e712 100644
--- a/helper/ccnb-parser/visitors/ccnb-parser-no-argu-visitor.h
+++ b/helper/ccnb-parser/visitors/ccnb-parser-no-argu-visitor.h
@@ -44,6 +44,8 @@
   virtual boost::any visit (Dtag& )=0; ///< \brief Method accepting DTAG block  
   virtual boost::any visit (Dattr&)=0; ///< \brief Method accepting DATTR block 
   virtual boost::any visit (Ext&  )=0; ///< \brief Method accepting EXT block
+
+  virtual ~NoArguVisitor () { }
 };
   
 }
diff --git a/helper/ccnb-parser/visitors/ccnb-parser-visitor.h b/helper/ccnb-parser/visitors/ccnb-parser-visitor.h
index 24212d4..e0fac3a 100644
--- a/helper/ccnb-parser/visitors/ccnb-parser-visitor.h
+++ b/helper/ccnb-parser/visitors/ccnb-parser-visitor.h
@@ -44,6 +44,8 @@
   virtual boost::any visit (Dtag&,  boost::any)=0; ///< \brief Method accepting DTAG block  
   virtual boost::any visit (Dattr&, boost::any)=0; ///< \brief Method accepting DATTR block 
   virtual boost::any visit (Ext&,   boost::any)=0; ///< \brief Method accepting EXT block
+
+  virtual ~Visitor () { }
 };                                                
                                                   
 }                                                 
diff --git a/helper/ccnb-parser/visitors/ccnb-parser-void-no-argu-visitor.h b/helper/ccnb-parser/visitors/ccnb-parser-void-no-argu-visitor.h
index 975c0c6..ad0ff74 100644
--- a/helper/ccnb-parser/visitors/ccnb-parser-void-no-argu-visitor.h
+++ b/helper/ccnb-parser/visitors/ccnb-parser-void-no-argu-visitor.h
@@ -43,6 +43,8 @@
   virtual void visit (Dtag& )=0; ///< \brief Method accepting DTAG block
   virtual void visit (Dattr&)=0; ///< \brief Method accepting DATTR block
   virtual void visit (Ext&  )=0; ///< \brief Method accepting EXT block
+
+  virtual ~VoidNoArguVisitor () { }
 };
   
 }
diff --git a/helper/ccnb-parser/visitors/ccnb-parser-void-visitor.h b/helper/ccnb-parser/visitors/ccnb-parser-void-visitor.h
index 9b45836..4fd228d 100644
--- a/helper/ccnb-parser/visitors/ccnb-parser-void-visitor.h
+++ b/helper/ccnb-parser/visitors/ccnb-parser-void-visitor.h
@@ -44,6 +44,8 @@
   virtual void visit (Dtag&,  boost::any)=0; ///< \brief Method accepting DTAG block  
   virtual void visit (Dattr&, boost::any)=0; ///< \brief Method accepting DATTR block 
   virtual void visit (Ext&,   boost::any)=0; ///< \brief Method accepting EXT block
+
+  virtual ~VoidVisitor () { }
 };
 
 }