Add Javadocs

api/src/main/java/dev/plex/util/adapter/ZonedDateTimeAdapter.java

@@ -12,16 +12,32 @@ import java.time.Instant;
 import java.time.ZoneId;
 import java.time.ZonedDateTime;
 
+/**
+ * Gson adapter that stores {@link ZonedDateTime} values as epoch milliseconds in UTC.
+ */
 public class ZonedDateTimeAdapter implements JsonSerializer<ZonedDateTime>, JsonDeserializer<ZonedDateTime>
 {
     private static final ZoneId UTC = ZoneId.of("Etc/UTC");
 
+    /**
+     * Creates a Gson adapter for {@link ZonedDateTime}.
+     */
+    public ZonedDateTimeAdapter()
+    {
+    }
+
+    /**
+     * {@inheritDoc}
+     */
     @Override
     public JsonElement serialize(ZonedDateTime src, Type typeOfSrc, JsonSerializationContext context)
     {
         return new JsonPrimitive(src.toInstant().toEpochMilli());
     }
 
+    /**
+     * {@inheritDoc}
+     */
     @Override
     public ZonedDateTime deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException
     {