diff --git a/src/launcher/booster.cpp b/src/launcher/booster.cpp
index 13fdb73..7598e0e 100644
--- a/src/launcher/booster.cpp
+++ b/src/launcher/booster.cpp
@@ -228,15 +228,18 @@ void* Booster::loadMain()
     void * module = dlopen(m_app.fileName().c_str(), RTLD_LAZY | RTLD_GLOBAL);
 
     if (!module)
-        Logger::logErrorAndDie(EXIT_FAILURE, "Booster: loading invoked application: '%s'\n", dlerror());
+        Logger::logErrorAndDie(EXIT_FAILURE, "Booster: Loading invoked application failed: '%s'\n", dlerror());
+
+    // Find out the address for symbol "main". dlerror() is first used to clear any old error conditions,
+    // then dlsym() is called, and then dlerror() is checked again. This procedure is documented
+    // in dlsym()'s man page.
 
-    // Find out the address for symbol "main".
     dlerror();
     m_app.setEntry(reinterpret_cast<entry_t>(dlsym(module, "main")));
 
     const char * error_s = dlerror();
     if (error_s != NULL)
-        Logger::logErrorAndDie(EXIT_FAILURE, "Booster: loading symbol 'main': '%s'\n", error_s);
+        Logger::logErrorAndDie(EXIT_FAILURE, "Booster: Loading symbol 'main' failed: '%s'\n", error_s);
 
     return module;
 }
diff --git a/src/launcher/booster.h b/src/launcher/booster.h
index 3f8551b..6ef906e 100644
--- a/src/launcher/booster.h
+++ b/src/launcher/booster.h
@@ -125,16 +125,26 @@ private:
     //! Disable assignment operator
     Booster & operator= (const Booster & r);
 
+    //! Load the library and jump to main
+    int launchProcess();
 
-    void  complainAndExit();
-    int   launchProcess();
+    //! Helper method: load the library and find out address for "main".
     void* loadMain();
 
+    //! Data structure representing the application to be invoked
     AppData m_app;
+
+    //! Socket connection to invoker
     Connection* m_conn;
 
+    //! Size (length) of the argument vector
     int m_argvArraySize;
+
+    //! Process priority before pushPriority() is called
     int m_oldPriority;
+
+    //! True if m_oldPriority is a valid value so that
+    //! it can be restored later.
     bool m_oldPriorityOk;
 
 #ifdef UNIT_TEST