fix: checkstyle issues

Author: rng70-or

core/src/main/java/hudson/model/HealthReport.java

@@ -356,6 +356,7 @@ public static HealthReport max(HealthReport a, HealthReport b) {
      */
     public static class ConverterImpl extends XStream2.PassthruConverter<HealthReport> {
         private static final long serialVersionUID = 1L;
+        
         public ConverterImpl(XStream2 xstream) { super(xstream); }
 
         @Override protected void callback(HealthReport hr, UnmarshallingContext context) {

core/src/main/java/hudson/security/AuthorizationStrategy.java

@@ -214,6 +214,7 @@ public abstract class AuthorizationStrategy extends AbstractDescribableImpl<Auth
 
     public static final class Unsecured extends AuthorizationStrategy implements Serializable {
         private static final long serialVersionUID = 1L;
+        
         /**
          * Maintains the singleton semantics.
          */

core/src/main/java/hudson/security/FederatedLoginService.java

@@ -116,6 +116,7 @@ public abstract class FederatedLoginService implements ExtensionPoint {
      */
     public abstract class FederatedIdentity implements Serializable {
         private static final long serialVersionUID = 1L;
+
         /**
          * Gets the string representation of the identity in the form that makes sense to the enclosing
          * {@link FederatedLoginService}, such as full OpenID URL.

core/src/main/java/org/acegisecurity/ui/WebAuthenticationDetails.java

@@ -33,6 +33,7 @@
 @Deprecated
 public class WebAuthenticationDetails implements Serializable {
     private static final long serialVersionUID = 1L;
+    
     public WebAuthenticationDetails(HttpServletRequest request) {}
 
 }