diff --git a/docgen/src/main/java/com/google/errorprone/DocGenTool.java b/docgen/src/main/java/com/google/errorprone/DocGenTool.java
index <HASH>..<HASH> 100644
--- a/docgen/src/main/java/com/google/errorprone/DocGenTool.java
+++ b/docgen/src/main/java/com/google/errorprone/DocGenTool.java
@@ -86,7 +86,7 @@ public final class DocGenTool {
 
   public static void main(String[] args) throws IOException {
     Options options = new Options();
-    new JCommander(options, args);
+    JCommander unused = new JCommander(options, args);
 
     Path bugPatterns = Paths.get(options.bugPatterns);
     if (!Files.exists(bugPatterns)) {
Assign unused instance to an unused variable.

(Alternatively, we could disable the check w/ an `XepOpt` --- thoughts?)

PiperOrigin-RevId: <I>