diff --git a/pom.xml b/pom.xml
index 11a2adc8..e2de86a2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -18,7 +18,7 @@
   <parent>
     <groupId>com.arpnetworking.build</groupId>
     <artifactId>arpnetworking-parent-pom</artifactId>
-    <version>3.3.4</version>
+    <version>3.3.6</version>
     <relativePath />
   </parent>
 
diff --git a/src/main/java/com/arpnetworking/tsdcore/model/Unit.java b/src/main/java/com/arpnetworking/tsdcore/model/Unit.java
index a600e6e8..937da05a 100644
--- a/src/main/java/com/arpnetworking/tsdcore/model/Unit.java
+++ b/src/main/java/com/arpnetworking/tsdcore/model/Unit.java
@@ -170,8 +170,11 @@ public double convert(final double sourceValue, final Unit sourceUnit) {
     };
 
     /* package private */enum Type {
+        /** Time duration. */
         TIME,
+        /** Quantity of data. */
         DATA_SIZE,
+        /** Temperature. */
         TEMPERATURE
     }