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

@@ -117,7 +117,9 @@ public void handle(HttpExchange exchange) throws IOException {
           } catch (PrivilegedActionException e) {
             if (e.getException() != null) {
               throw new IOException(e.getException());
-            } else throw new IOException(e);
+            } else {
+                throw new IOException(e);
+            }
           }
         } else {
           drainInputAndClose(exchange);
@@ -130,8 +132,9 @@ public void handle(HttpExchange exchange) throws IOException {
   private void drainInputAndClose(HttpExchange httpExchange) throws IOException {
     InputStream inputStream = httpExchange.getRequestBody();
     byte[] b = new byte[4096];
-    while (inputStream.read(b) != -1)
-      ;
+    while (inputStream.read(b) != -1) {
+        // nop
+    }
     inputStream.close();
   }
 

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

@@ -10,7 +10,12 @@
 import io.opentelemetry.sdk.metrics.data.MetricDataType;
 import io.opentelemetry.sdk.metrics.data.PointData;
 import io.opentelemetry.sdk.metrics.internal.data.ImmutableDoubleExemplarData;
-import io.prometheus.metrics.model.snapshots.*;
+import io.prometheus.metrics.model.snapshots.DataPointSnapshot;
+import io.prometheus.metrics.model.snapshots.Exemplar;
+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;