[NO_TICKET] Add error handler

Author: akos-hrvth

src/main/java/com/getourguide/interview/error/ErrorHandler.java

@@ -0,0 +1,17 @@
+package com.getourguide.interview.error;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+
+@ControllerAdvice
+@Slf4j
+public class ErrorHandler {
+
+    @ExceptionHandler
+    public ResponseEntity<String> handleException(Exception e) {
+        log.error(e.getMessage());
+        return ResponseEntity.status(500).body("Something went wrong");
+    }
+}