Changed some method signatures for cleaner code. (#63)

Author: Kevin Hellemun

BunqSdk/Exception/ExceptionFactory.cs

@@ -25,9 +25,9 @@ public static ApiException CreateExceptionForResponse(
             int responseCode,
             IList<string> messages,
             string responseId
-            )
+        )
         {
-            var errorMessage = ConcatenateAllMessage(messages, responseId);
+            var errorMessage = FormatExceptionMessage(messages, responseId);
 
             switch (responseCode)
             {
@@ -50,7 +50,10 @@ string responseId
             }
         }
 
-        private static string ConcatenateAllMessage(IEnumerable<string> messages, string responseId)
+        /// <summary>
+        /// Formats the exception message accordingly.
+        /// </summary>
+        private static string FormatExceptionMessage(IEnumerable<string> messages, string responseId)
         {
             return string.Format(FORMAT_ERROR_MESSAGE,
                 responseId,

BunqSdk/Http/ApiClient.cs

@@ -293,11 +293,11 @@ private static void AssertResponseSuccess(HttpResponseMessage responseMessage)
             throw CreateApiExceptionRequestUnsuccessful(
                 responseCode,
                 responseBody,
-                GetResponseId(responseMessage.Headers)
-                );
+                DetermineResponseIdByAllHeader(responseMessage.Headers)
+            );
         }
 
-        private static string GetResponseId(HttpHeaders allHeader)
+        private static string DetermineResponseIdByAllHeader(HttpHeaders allHeader)
         {
             if (allHeader.Contains(HEADER_RESPONSE_ID_UPPER_CASE))
             {