change output if there was no events

main.go

@@ -427,6 +427,11 @@ func main() {
 	}
 
 	// Output final results in JSON
-	j, _ := json.Marshal(combined)
+	if len(combined) > 0 {
-	fmt.Println(string(j))
+		j, _ := json.Marshal(combined)
+		fmt.Println(string(j))
+	} else {
+		fmt.Println("{}")
+	}
+
 }