Minor improvements.

Author: hrytsenko

src/main/java/com/github/hrytsenko/jsondata/springboot/error/ServiceException.java

@@ -17,9 +17,9 @@
 
 import lombok.Getter;
 
+@Getter
 public class ServiceException extends RuntimeException {
 
-    @Getter
     String code;
 
     private ServiceException(String code) {
@@ -34,7 +34,7 @@ private ServiceException(String code, Throwable cause) {
     public static class BadRequest extends ServiceException {
 
         public BadRequest(String code) {
-            super(code);
+            this(code, null);
         }
 
         public BadRequest(String code, Throwable cause) {
@@ -82,7 +82,7 @@ public NotFound(Throwable cause) {
     public static class InternalError extends ServiceException {
 
         public InternalError(String code) {
-            super(code);
+            this(code, null);
         }
 
         public InternalError(String code, Throwable cause) {

src/test/java/com/github/hrytsenko/jsondata/springboot/web/JacksonConfigurationTest.java

@@ -46,7 +46,7 @@ void serialize() {
 
         Map<String, ?> expectedObject = stringToMap("{'foo':'FOO'}");
         Mockito.verify(sourceGenerator)
-                .writeObject(Mockito.eq(expectedObject));
+                .writeObject(expectedObject);
     }
 
     @Test