Add findbugs-maven-plugin

Address one bug and ignore XSS bugs.

pom.xml

@@ -122,6 +122,15 @@
           <forkedProcessTimeoutInSeconds>300</forkedProcessTimeoutInSeconds>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>findbugs-maven-plugin</artifactId>
+        <version>3.0.0</version>
+        <configuration>
+          <effort>Max</effort>
+          <omitVisitors>CrossSiteScripting</omitVisitors>
+        </configuration>
+      </plugin>
       <plugin>
         <groupId>org.skife.maven</groupId>
         <artifactId>really-executable-jar-maven-plugin</artifactId>

src/main/java/org/gaul/s3proxy/S3ProxyHandler.java

@@ -373,7 +373,7 @@ final class S3ProxyHandler extends AbstractHandler {
         String maxKeysString = request.getParameter("max-keys");
         if (maxKeysString != null) {
             try {
-                maxKeys = Integer.valueOf(maxKeysString);
+                maxKeys = Integer.parseInt(maxKeysString);
             } catch (NumberFormatException nfe) {
                 sendSimpleErrorResponse(response,
                         HttpServletResponse.SC_BAD_REQUEST, "InvalidArgument",