diff --git a/src/main/java/net/openhft/chronicle/map/JsonSerializer.java b/src/main/java/net/openhft/chronicle/map/JsonSerializer.java
index d0b84b359..5edd6eac0 100644
--- a/src/main/java/net/openhft/chronicle/map/JsonSerializer.java
+++ b/src/main/java/net/openhft/chronicle/map/JsonSerializer.java
@@ -51,7 +51,9 @@ final class JsonSerializer {
                     "</dependency>\n";
     private static final Logger LOG = LoggerFactory.getLogger(JsonSerializer.class);
 
-    static synchronized <K, V> void getAll(File toFile, Map<K, V> map, List<?> jsonConverters) throws IOException {
+    static synchronized <K, V> void getAll(final File toFile,
+                                           final Map<K, V> map,
+                                           final List<?> jsonConverters) throws IOException {
         final XStream xstream = xStream(map, jsonConverters);
 
         try (OutputStream outputStream = createOutputStream(toFile)) {
@@ -59,7 +61,9 @@ final class JsonSerializer {
         }
     }
 
-    static synchronized <K, V> void putAll(File fromFile, Map<K, V> map, List<?> jsonConverters) throws IOException {
+    static synchronized <K, V> void putAll(final File fromFile,
+                                           final Map<K, V> map,
+                                           final List<?> jsonConverters) throws IOException {
         final XStream xstream = xStream(map, jsonConverters);
 
         try (InputStream inputStream = createInputStream(fromFile)) {
@@ -67,21 +71,21 @@ final class JsonSerializer {
         }
     }
 
-    private static InputStream createInputStream(File toFile) throws IOException {
+    private static InputStream createInputStream(final File toFile) throws IOException {
         if (toFile.getName().toLowerCase().endsWith(".gz"))
             return new GZIPInputStream(new FileInputStream(toFile));
         else
             return new FileInputStream(toFile);
     }
 
-    private static OutputStream createOutputStream(File toFile) throws IOException {
+    private static OutputStream createOutputStream(final File toFile) throws IOException {
         if (toFile.getName().toLowerCase().endsWith(".gz"))
             return new GZIPOutputStream(new FileOutputStream(toFile));
         else
             return new FileOutputStream(toFile);
     }
 
-    private static <K, V> XStream xStream(Map<K, V> map, List<?> jsonConverters) {
+    private static <K, V> XStream xStream(final Map<K, V> map, final List<?> jsonConverters) {
         try {
             final XStream xstream = new XStream(new JettisonMappedXmlDriver());
             xstream.setMode(XStream.NO_REFERENCES);
@@ -109,7 +113,7 @@ final class JsonSerializer {
         }
     }
 
-    private static <K, V> void registerChronicleMapConverter(Map<K, V> map, XStream xstream) {
+    private static <K, V> void registerChronicleMapConverter(final Map<K, V> map, final XStream xstream) {
         xstream.registerConverter(new VanillaChronicleMapConverter<>(map));
     }
 }
\ No newline at end of file