Add initial config classes

include/cppkafka/exceptions.h

@@ -0,0 +1,24 @@
+#ifndef CPPKAFKA_EXCEPTIONS_H
+#define CPPKAFKA_EXCEPTIONS_H
+
+#include <stdexcept>
+#include <string>
+
+namespace cppkafka {
+
+class KafkaException : public std::exception {
+
+};
+
+class KafkaConfigException : public KafkaException {
+public:
+    KafkaConfigException(const std::string& config_name, const std::string& error);
+
+    const char* what() const noexcept;
+private:
+    std::string message_;
+};
+
+} // cppkafka
+
+#endif // CPPKAFKA_EXCEPTIONS_H