Feat: Adds AuditLog

Author: nilejack

lesson_17/bank/bank_app/src/main/java/com/codedifferently/lesson17/bank/exceptions/AuditLog.java

@@ -1 +1,8 @@
+package com.codedifferently.lesson17.bank.exceptions;
 
+import java.util.ArrayList;
+import java.util.List;
+
+public class AuditLog {
+  private final List<String> logEntries = new ArrayList<>();
+}