[PR #1] cleaning

src/main/java/com/datadoghq/trace/impl/DDSpan.java

@@ -80,6 +80,7 @@ public class DDSpan implements io.opentracing.Span {
         this.context.getTrace().add(this);
 
         // check DD attributes required
+        // FIXME Remove IAE
         if (this.context.getServiceName() == null) {
             throw new IllegalArgumentException("No ServiceName provided");
         }

src/main/java/com/datadoghq/trace/impl/DDTracer.java

@@ -228,10 +228,8 @@ public class DDTracer implements io.opentracing.Tracer {
             return context;
         }
 
-
     }
 
-
     @Override
     public String toString() {
         return "DDTracer{" +

src/main/java/com/datadoghq/trace/writer/impl/DDAgentWriter.java

@@ -75,6 +75,7 @@ public class DDAgentWriter implements Writer {
      */
     public void write(List<Span> trace) {
         //Try to add a new span in the queue
+        //FIXME oldest?
         boolean proceed = tokens.tryAcquire(trace.size());
 
         if (proceed) {