diff --git a/src/main/java/net/openhft/chronicle/hash/ChronicleHashBuilder.java b/src/main/java/net/openhft/chronicle/hash/ChronicleHashBuilder.java
index bebcae75e..00bd382bc 100755
--- a/src/main/java/net/openhft/chronicle/hash/ChronicleHashBuilder.java
+++ b/src/main/java/net/openhft/chronicle/hash/ChronicleHashBuilder.java
@@ -36,9 +36,8 @@ import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.TimeUnit;
 
 /**
- * This interface defines the meaning of configurations, common to {@link
- * ChronicleMapBuilder} and {@link ChronicleSetBuilder}, i.
- * e. <i>Chronicle hash container</i> configurations.
+ * This interface defines the meaning of configurations, common to {@link ChronicleMapBuilder} and
+ * {@link ChronicleSetBuilder}, i. e. <i>Chronicle hash container</i> configurations.
  *
  * <p>{@code ChronicleHashBuilder} is mutable. Configuration methods mutate the builder and return
  * <i>the builder itself</i> back to support chaining pattern, rather than the builder copies with
diff --git a/src/test/java/eg/MapDiagnostics.java b/src/main/java/net/openhft/chronicle/map/MapDiagnostics.java
similarity index 78%
rename from src/test/java/eg/MapDiagnostics.java
rename to src/main/java/net/openhft/chronicle/map/MapDiagnostics.java
index 3f3dc7de5..158bd0c5b 100644
--- a/src/test/java/eg/MapDiagnostics.java
+++ b/src/main/java/net/openhft/chronicle/map/MapDiagnostics.java
@@ -14,13 +14,21 @@
  *      along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-package eg;
+package net.openhft.chronicle.map;
 
-import net.openhft.chronicle.map.ChronicleMap;
-import net.openhft.chronicle.map.MapSegmentContext;
+import java.io.File;
+import java.io.IOException;
 
 public final class MapDiagnostics {
 
+    public static void main(String[] args) throws IOException {
+        String mapFile = args[0];
+        try (ChronicleMap map = ChronicleMap.of(Object.class, Object.class)
+                .createPersistedTo(new File(mapFile))) {
+            printMapStats(map);
+        }
+    }
+
     public static <K, V> void printMapStats(ChronicleMap<K, V> map) {
         for (int i = 0; i < map.segments(); i++) {
             try (MapSegmentContext<K, V, ?> c = map.segmentContext(i)) {
diff --git a/src/test/java/eg/WordCountTest.java b/src/test/java/eg/WordCountTest.java
index 25bf53b3a..132805900 100644
--- a/src/test/java/eg/WordCountTest.java
+++ b/src/test/java/eg/WordCountTest.java
@@ -20,6 +20,7 @@ import com.google.common.io.ByteStreams;
 import net.openhft.chronicle.core.io.Closeable;
 import net.openhft.chronicle.core.values.IntValue;
 import net.openhft.chronicle.map.ChronicleMap;
+import net.openhft.chronicle.map.MapDiagnostics;
 import net.openhft.chronicle.values.Values;
 import org.junit.Test;