Base: Fix header uniformity, whitespace, and doxygen

[skip ci]

src/Base/Persistence.cpp

@@ -101,7 +101,7 @@ std::string Persistence::encodeAttribute(const std::string& str)
 
 void Persistence::dumpToStream(std::ostream& stream, int compression)
 {
-    //we need to close the zipstream to get a good result, the only way to do this is to delete the ZipWriter. 
+    //we need to close the zipstream to get a good result, the only way to do this is to delete the ZipWriter.
     //Hence the scope...
     {
         //create the writer