diff --git a/src/include/bagmetadata.hpp b/src/include/bagmetadata.hpp
index d1a337c..c800aa7 100644
--- a/src/include/bagmetadata.hpp
+++ b/src/include/bagmetadata.hpp
@@ -45,7 +45,7 @@ class Bagmetadata{
     stringstream log;
 
   public:
-    Bagmetadata( string basedir );
+    explicit Bagmetadata( string basedir );
 
     string get_SourceOrganization();
     string get_OrganizationAddress();
diff --git a/src/include/othertags.hpp b/src/include/othertags.hpp
index c6d622a..c3dd57b 100644
--- a/src/include/othertags.hpp
+++ b/src/include/othertags.hpp
@@ -23,7 +23,7 @@ class Othertags{
     stringstream log;
   public:
     Othertags( string basedir);
-    bool store( string basedir);
+    static bool store( string basedir);
     bool set_other_tag_files( list<string> &);
     list<string> get_other_tag_files();
     void get_logstream( stringstream & log);
diff --git a/src/lib/bag.cpp b/src/lib/bag.cpp
index 482721f..f0bd6fb 100644
--- a/src/lib/bag.cpp
+++ b/src/lib/bag.cpp
@@ -27,6 +27,10 @@ using namespace std;
 
 
 Bag::Bag( string dfname ) {
+
+  if ('/' != dfname.back()) {
+      dfname += "/";
+  }
   // log << "load constructor (" << dfname << ")" << endl;
   // read in file bagit.txt
   string bagit_txt_path =  dfname + "bagit.txt";
diff --git a/src/lib/bagmetadata.cpp b/src/lib/bagmetadata.cpp
index 9fdec90..b12c679 100644
--- a/src/lib/bagmetadata.cpp
+++ b/src/lib/bagmetadata.cpp
@@ -131,8 +131,8 @@ oxum_t Bagmetadata::get_PayloadOxum() {
     string sstreams;
     getline(oxumstring, soctets, '.');
     getline(oxumstring, sstreams, '.');
-    oxum.octetcount = stoi( soctets );
-    oxum.streamcount = stoi( sstreams );
+    oxum.octetcount = stoul( soctets );
+    oxum.streamcount = stoul( sstreams );
   }
   return oxum;
 }
@@ -376,7 +376,7 @@ void Bagmetadata::set_BagSize(string BagSize) {
 
 void Bagmetadata::set_BagSize( unsigned long long int bytes) {
 
-    if        (bytes > (const unsigned long long int) (1024ull*1024ull*1024ull*1024ull) ) {
+    if        (bytes > 1024ull * 1024ull * 1024ull * 1024ull) {
         this->metadata["BagSize"] = to_string (bytes/ (1024ull*1024ull*1024ull*1024ull)) + " TB";
     } else if (bytes > (1024ull *1024ull*1024ull) ) {
         this->metadata["BagSize"] = to_string (bytes/ (1024ull*1024ull*1024ull))      + " GB";
diff --git a/src/lib/fetchfile.cpp b/src/lib/fetchfile.cpp
index 61c3084..ea3c672 100644
--- a/src/lib/fetchfile.cpp
+++ b/src/lib/fetchfile.cpp
@@ -58,7 +58,7 @@ Fetchfile::Fetchfile( string basedir ) {
 		    line_ss >> subfile;
 		    fetch_t entry;
 		    entry.url = url;
-		    entry.size = stoi( length );
+		    entry.size = stoul( length );
 		    entry.filename = subfile;
 		    this->entries.push_back( entry );
 	    }
@@ -71,7 +71,6 @@ Fetchfile::Fetchfile( string basedir ) {
 
 bool Fetchfile::fetch( fetch_t fetch ) {
 	CURL *curl;
-	CURLcode result;
 	curl = curl_easy_init();
 	if (curl != nullptr) {
 		FILE *fp;
@@ -81,7 +80,7 @@ bool Fetchfile::fetch( fetch_t fetch ) {
 		// see https://curl.haxx.se/libcurl/c/CURLOPT_WRITEFUNCTION.html#DESCRIPTION
 		curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, NULL);
 		curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
-		result = curl_easy_perform(curl);
+        CURLcode result = curl_easy_perform(curl);
 		curl_easy_cleanup(curl);
 		fclose(fp);
 	} else {
diff --git a/src/lib/manifest.cpp b/src/lib/manifest.cpp
index d6871c4..72765b2 100644
--- a/src/lib/manifest.cpp
+++ b/src/lib/manifest.cpp
@@ -89,8 +89,8 @@ bool Manifest::validate() {
   for (auto & manifest_algorithm_file : this->manifest_algorithm_files) {
       string manifest_file = manifest_algorithm_file.second;
       checksum_algorithms alg = manifest_algorithm_file.first;
-      fs::path p{ manifest_file };
-      if (fs::is_regular_file( p )) {
+      fs::path manifest_path{manifest_file };
+      if (fs::is_regular_file(manifest_path )) {
 	      at_least_one_manifest=true;
       }
 
@@ -108,9 +108,9 @@ bool Manifest::validate() {
         this->log << "Bagit file '" << file << "', checksum '" << expected_checksum << "' is expected by file '" << manifest_file  << "', but found: '" << calc_checksum << "'" << endl;
         is_valid = false;
       }
-      fs::path p{ file };
+      fs::path file_path{file };
       // fs::file_status s = fs::status( p );
-      if (! fs::is_regular_file( p )) {
+      if (! fs::is_regular_file(file_path )) {
               this->log << "Bagit file '" << file << "' does not exists in '" << this->basedir << "'" << endl;
       }
     }
diff --git a/test/test_tagmanifest.cpp b/test/test_tagmanifest.cpp
index 926eb90..c2fb95d 100644
--- a/test/test_tagmanifest.cpp
+++ b/test/test_tagmanifest.cpp
@@ -33,14 +33,13 @@ bool check_get_checksum_file_pairs() {
     {"eaa2c609ff6371712f623f5531945b44", "bagit.txt"},
   };
   multimap<string,string>::iterator i;
-  multimap<string,string>::iterator j;
   bool is_valid = true;
   for (i=expected.begin(); i!=expected.end() ; i++) {
       cout << "Expected: (" << (i->first) << "," << (i->second) << ")" << endl;
-      auto j = results.find( i->first );
-      if (j != results.end()) { // file found
-          if (j->first != i->first) { 
-            cout << "Results: ("  << (j->first) << "," << (j->second) << ")" << endl;
+      auto idx_first_match = results.find(i->first );
+      if (idx_first_match != results.end()) { // file found
+          if (idx_first_match->first != i->first) {
+            cout << "Results: (" << (idx_first_match->first) << "," << (idx_first_match->second) << ")" << endl;
             is_valid=false; break;
           }
       } else {
diff --git a/test/testbag.cpp b/test/testbag.cpp
index ee330e8..d9f4980 100644
--- a/test/testbag.cpp
+++ b/test/testbag.cpp
@@ -169,8 +169,6 @@ BOOST_AUTO_TEST_CASE(check_invalid_dirs) {
   check_invalid_dirs();
 }
 
-
-
 BOOST_FIXTURE_TEST_CASE(check_store_ok, TARGETFIXTURE) {
   BOOST_TEST(check_store("../testbags/bag_minimal_ok/", targetdir));
 };