diff --git a/framework/src/play/Play.java b/framework/src/play/Play.java
index a8700c0cf0..ce0c4ebc9c 100644
--- a/framework/src/play/Play.java
+++ b/framework/src/play/Play.java
@@ -70,15 +70,15 @@ public boolean isProd() {
     /**
      * The framework ID
      */
-    public static String id;
+    public static String id = System.getProperty("play.id", "");
     /**
      * The application mode
      */
-    public static Mode mode;
+    public static Mode mode = Mode.DEV;
     /**
      * The application root
      */
-    public static File applicationPath = null;
+    public static File applicationPath = new File(System.getProperty("application.path", "."));
     /**
      * tmp dir
      */
@@ -106,11 +106,11 @@ public boolean isProd() {
     /**
      * All paths to search for Java files
      */
-    public static List<VirtualFile> javaPath;
+    public static List<VirtualFile> javaPath = new CopyOnWriteArrayList<>();
     /**
      * All paths to search for templates files
      */
-    public static List<VirtualFile> templatesPath;
+    public static List<VirtualFile> templatesPath = new ArrayList<>(2);
     /**
      * Main routes file
      */
@@ -118,7 +118,7 @@ public boolean isProd() {
     /**
      * Plugin routes files
      */
-    public static Map<String, VirtualFile> modulesRoutes;
+    public static Map<String, VirtualFile> modulesRoutes = new HashMap<>(16);
     /**
      * The loaded configuration files
      */
@@ -126,7 +126,7 @@ public boolean isProd() {
     /**
      * The app configuration (already resolved from the framework id)
      */
-    public static Properties configuration;
+    public static Properties configuration = new Properties();
     /**
      * The last time than the application has started
      */
@@ -262,24 +262,24 @@ public static void init(File root, String id) {
 
         // Build basic java source path
         VirtualFile appRoot = VirtualFile.open(applicationPath);
+        roots.clear();
         roots.add(appRoot);
-        javaPath = new CopyOnWriteArrayList<>();
+        
+        javaPath.clear();
         javaPath.add(appRoot.child("app"));
         javaPath.add(appRoot.child("conf"));
 
         // Build basic templates path
+        templatesPath.clear();
         if (appRoot.child("app/views").exists() || (usePrecompiled && appRoot.child("precompiled/templates/app/views").exists())) {
-            templatesPath = new ArrayList<>(2);
             templatesPath.add(appRoot.child("app/views"));
-        } else {
-            templatesPath = new ArrayList<>(1);
         }
-
+        
         // Main route file
         routes = appRoot.child("conf/routes");
 
         // Plugin route files
-        modulesRoutes = new HashMap<>(16);
+        modulesRoutes.clear();
 
         // Load modules
         loadModules(appRoot);
diff --git a/framework/src/play/db/Evolutions.java b/framework/src/play/db/Evolutions.java
index 5a94493492..701008cf53 100644
--- a/framework/src/play/db/Evolutions.java
+++ b/framework/src/play/db/Evolutions.java
@@ -47,16 +47,11 @@ public class Evolutions extends PlayPlugin {
 
     public static void main(String[] args) throws SQLException {
         /** Start the DB plugin **/
-        Play.id = System.getProperty("play.id");
-        Play.applicationPath = new File(System.getProperty("application.path"));
         Play.guessFrameworkPath();
         Play.readConfiguration();
-        Play.javaPath = new ArrayList<>();
         Play.classes = new ApplicationClasses();
         Play.classloader = new ApplicationClassloader();
 
-        Play.templatesPath = new ArrayList<>();
-        Play.modulesRoutes = new HashMap<>();
         Play.loadModules(VirtualFile.open(Play.applicationPath));
 
         if (System.getProperty("modules") != null) {
diff --git a/framework/src/play/i18n/Messages.java b/framework/src/play/i18n/Messages.java
index 38929519b8..0c3f39d1ab 100644
--- a/framework/src/play/i18n/Messages.java
+++ b/framework/src/play/i18n/Messages.java
@@ -32,11 +32,11 @@ public class Messages {
 
     private static final Object[] NO_ARGS = new Object[] { null };
 
-    static public Properties defaults;
+    public static Properties defaults = new Properties();
 
-    static public Map<String, Properties> locales = new HashMap<>();
+    public static Map<String, Properties> locales = new HashMap<>();
 
-    static Pattern recursive = Pattern.compile("&\\{(.*?)\\}");
+    private static final Pattern recursive = Pattern.compile("&\\{(.*?)\\}");
 
     /**
      * Given a message code, translate it using current locale. If there is no
@@ -107,7 +107,7 @@ public static String getMessage(String locale, Object key, Object... args) {
         if (value == null && locale != null && locale.length() == 5 && locales.containsKey(locale.substring(0, 2))) {
             value = locales.get(locale.substring(0, 2)).getProperty(key.toString());
         }
-        if (value == null && defaults != null) {
+        if (value == null) {
             value = defaults.getProperty(key.toString());
         }
         if (value == null) {
@@ -196,7 +196,7 @@ public static Properties all(String locale) {
             return defaults;
         Properties mergedMessages = new Properties();
         mergedMessages.putAll(defaults);
-        if (locale != null && locale.length() == 5 && locales.containsKey(locale.substring(0, 2))) {
+        if (locale.length() == 5 && locales.containsKey(locale.substring(0, 2))) {
             mergedMessages.putAll(locales.get(locale.substring(0, 2)));
         }
         mergedMessages.putAll(locales.get(locale));
diff --git a/framework/src/play/jobs/JobsPlugin.java b/framework/src/play/jobs/JobsPlugin.java
index bfe0124cd3..12d07c4ca1 100644
--- a/framework/src/play/jobs/JobsPlugin.java
+++ b/framework/src/play/jobs/JobsPlugin.java
@@ -29,7 +29,7 @@
 public class JobsPlugin extends PlayPlugin {
 
     public static ScheduledThreadPoolExecutor executor;
-    public static List<Job> scheduledJobs;
+    public static List<Job> scheduledJobs = new ArrayList<>();
     private static final ThreadLocal<List<Callable<?>>> afterInvocationActions = new ThreadLocal<>();
 
     @Override
@@ -183,7 +183,7 @@ private Job<?> createJob(Class<?> clazz) throws InstantiationException, IllegalA
     public void onApplicationStart() {
         int core = Integer.parseInt(Play.configuration.getProperty("play.jobs.pool", "10"));
         executor = new ScheduledThreadPoolExecutor(core, new PThreadFactory("jobs"), new ThreadPoolExecutor.AbortPolicy());
-        scheduledJobs = new ArrayList<>();
+        scheduledJobs.clear();
     }
 
     public static <V> void scheduleForCRON(Job<V> job) {