add checkstyle

Signed-off-by: Gregor Zeitlinger <[email protected]>

Author: zeitlinger

prometheus-metrics-exporter-httpserver/src/main/java/io/prometheus/metrics/exporter/httpserver/HTTPServer.java

@@ -118,7 +118,7 @@ public void handle(HttpExchange exchange) throws IOException {
             if (e.getException() != null) {
               throw new IOException(e.getException());
             } else {
-                throw new IOException(e);
+              throw new IOException(e);
             }
           }
         } else {
@@ -133,7 +133,7 @@ private void drainInputAndClose(HttpExchange httpExchange) throws IOException {
     InputStream inputStream = httpExchange.getRequestBody();
     byte[] b = new byte[4096];
     while (inputStream.read(b) != -1) {
-        // nop
+      // nop
     }
     inputStream.close();
   }

prometheus-metrics-exporter-opentelemetry/src/main/java/io/prometheus/metrics/exporter/opentelemetry/otelmodel/PrometheusData.java

@@ -15,7 +15,6 @@
 import io.prometheus.metrics.model.snapshots.Exemplars;
 import io.prometheus.metrics.model.snapshots.Label;
 import io.prometheus.metrics.model.snapshots.Labels;
-
 import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.TimeUnit;