diff --git a/README.md b/README.md
index 92a779c17..6188ae9e8 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 ![License](http://img.shields.io/:license-apache-blue.svg)
 [![Gitter](https://badges.gitter.im/davidsowerby/krail.svg)](https://gitter.im/davidsowerby/krail?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
-[![Build Status](https://travis-ci.org/davidsowerby/krailkrail.svg?branch=master)](https://travis-ci.org/davidsowerby/krail)
+[![Build Status](https://travis-ci.org/davidsowerby/krail.svg?branch=master)](https://travis-ci.org/davidsowerby/krail)
 [![Coverage Status](https://coveralls.io/repos/github/davidsowerby/krail/badge.svg?branch=master)](https://coveralls.io/github/davidsowerby/krail?branch=master)
 
 Krail provides a framework for rapid Java web development by combining Vaadin, Guice, Apache Shiro, Apache Commons Configuration and others.  For more information, see the comprehensive [Tutorial](http://krail.readthedocs.org/en/master/), which also makes a reasonable demo.  (You can clone directly from the [Tutorial repo](https://github.com/davidsowerby/krail-tutorial))
diff --git a/src/main/java/uk/q3c/krail/core/config/ConfigKeys.java b/src/main/java/uk/q3c/krail/core/config/ConfigKeys.java
index 26b78d72a..1720e23e7 100644
--- a/src/main/java/uk/q3c/krail/core/config/ConfigKeys.java
+++ b/src/main/java/uk/q3c/krail/core/config/ConfigKeys.java
@@ -21,6 +21,8 @@
  */
 public class ConfigKeys {
 
+    private ConfigKeys(){}
+
     public static final String SITEMAP_SOURCES = "sitemap.sources";
     public static final String SERVER_PUSH_ENABLED = "server.pushEnabled";
 
diff --git a/src/main/java/uk/q3c/krail/core/persist/common/common/KrailPersistenceUnitHelper.java b/src/main/java/uk/q3c/krail/core/persist/common/common/KrailPersistenceUnitHelper.java
index a22137424..34797c40b 100644
--- a/src/main/java/uk/q3c/krail/core/persist/common/common/KrailPersistenceUnitHelper.java
+++ b/src/main/java/uk/q3c/krail/core/persist/common/common/KrailPersistenceUnitHelper.java
@@ -30,6 +30,8 @@
  */
 public class KrailPersistenceUnitHelper {
 
+    private KrailPersistenceUnitHelper(){}
+
     public static final String PROVIDE_PATTERN_DAO = "ProvidePatternDao";
     public static final String PROVIDE_OPTION_DAO = "ProvideOptionDao";
 
diff --git a/src/main/java/uk/q3c/util/ID.java b/src/main/java/uk/q3c/util/ID.java
index 615b65f5c..22c1aa89f 100644
--- a/src/main/java/uk/q3c/util/ID.java
+++ b/src/main/java/uk/q3c/util/ID.java
@@ -34,6 +34,7 @@
  */
 public class ID {
 
+    private ID(){}
 
     public static String getId(@Nonnull Optional<?> qualifier, Object... components) {
         checkNotNull(qualifier);
diff --git a/src/main/java/uk/q3c/util/MessageFormat.java b/src/main/java/uk/q3c/util/MessageFormat.java
index 67593b6e1..679d0cf20 100644
--- a/src/main/java/uk/q3c/util/MessageFormat.java
+++ b/src/main/java/uk/q3c/util/MessageFormat.java
@@ -31,6 +31,9 @@
  * @author David Sowerby 10 Feb 2013
  */
 public class MessageFormat {
+
+    private MessageFormat(){}
+
     private static Logger log = LoggerFactory.getLogger(MessageFormat.class);
 
     /**
diff --git a/src/main/java/uk/q3c/util/ReflectionUtils.java b/src/main/java/uk/q3c/util/ReflectionUtils.java
index 0cc340a1b..d0813b6d5 100644
--- a/src/main/java/uk/q3c/util/ReflectionUtils.java
+++ b/src/main/java/uk/q3c/util/ReflectionUtils.java
@@ -17,6 +17,8 @@
 
 public class ReflectionUtils {
 
+    private ReflectionUtils(){}
+
     public static Set<Class<?>> allInterfaces(Class<?> clazz) {
         Set<Class<?>> allInterfaces = new HashSet<>();
         Class<?> classToCheck = clazz;