Fix CheckStyle warnings

- Add missing braces around if-block
- Remove redundant 'public' modifier on constructors and interface methods
- Use uppercase 'L' for long values

Change-Id: I0c92583d2ef2e6faec19c080d1923308b512e147
diff --git a/src/main/java/com/googlesource/gerrit/plugins/quota/MaxRepositorySizeQuota.java b/src/main/java/com/googlesource/gerrit/plugins/quota/MaxRepositorySizeQuota.java
index f23d11f..e9a1973 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/quota/MaxRepositorySizeQuota.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/quota/MaxRepositorySizeQuota.java
@@ -134,8 +134,9 @@
 
   private boolean needPack(Collection<ReceiveCommand> commands) {
     for (ReceiveCommand cmd : commands) {
-      if (cmd.getType() != ReceiveCommand.Type.DELETE)
+      if (cmd.getType() != ReceiveCommand.Type.DELETE) {
         return true;
+      }
     }
     return false;
   }
diff --git a/src/main/java/com/googlesource/gerrit/plugins/quota/MetaDataImpl.java b/src/main/java/com/googlesource/gerrit/plugins/quota/MetaDataImpl.java
index 194241c..ae952f8 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/quota/MetaDataImpl.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/quota/MetaDataImpl.java
@@ -23,7 +23,7 @@
   private String unitSymbol;
   private String description;
 
-  public MetaDataImpl(String name, String unitName, String unitSymbol, String description) {
+  MetaDataImpl(String name, String unitName, String unitSymbol, String description) {
     this.name = name;
     this.unitName = unitName;
     this.unitSymbol = unitSymbol;
diff --git a/src/main/java/com/googlesource/gerrit/plugins/quota/UsageDataEvent.java b/src/main/java/com/googlesource/gerrit/plugins/quota/UsageDataEvent.java
index 8dfaa55..d37709c 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/quota/UsageDataEvent.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/quota/UsageDataEvent.java
@@ -28,7 +28,7 @@
   private final MetaData metaData;
   private final List<Data> data;
 
-  public UsageDataEvent(MetaData metaData) {
+  UsageDataEvent(MetaData metaData) {
     this.metaData = metaData;
     timestamp = new Timestamp(System.currentTimeMillis());
     data = new ArrayList<>();
diff --git a/src/main/java/com/googlesource/gerrit/plugins/quota/UsageDataEventCreator.java b/src/main/java/com/googlesource/gerrit/plugins/quota/UsageDataEventCreator.java
index 5ad42b9..56db9b3 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/quota/UsageDataEventCreator.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/quota/UsageDataEventCreator.java
@@ -18,8 +18,8 @@
 
 public interface UsageDataEventCreator {
 
-  public String getName();
+  String getName();
 
-  public UsageDataPublishedListener.Event create();
+  UsageDataPublishedListener.Event create();
 
 }
diff --git a/src/test/java/com/googlesource/gerrit/plugins/quota/GCListenerTest.java b/src/test/java/com/googlesource/gerrit/plugins/quota/GCListenerTest.java
index f59bbc1..f8df792 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/quota/GCListenerTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/quota/GCListenerTest.java
@@ -39,15 +39,15 @@
   @Test
   public void testEventWithStatistics() {
     RepoSizeCache repoSizeCache = createMock(RepoSizeCache.class);
-    repoSizeCache.set(new Project.NameKey(PROJECT_NAME), 9999l);
+    repoSizeCache.set(new Project.NameKey(PROJECT_NAME), 9999L);
     expectLastCall();
     replay(repoSizeCache);
 
     GCListener listener = new GCListener(repoSizeCache);
 
     final Properties statistics = new Properties();
-    statistics.put("sizeOfLooseObjects", 1234l);
-    statistics.put("sizeOfPackedObjects", 8765l);
+    statistics.put("sizeOfLooseObjects", 1234L);
+    statistics.put("sizeOfPackedObjects", 8765L);
 
     listener.onGarbageCollected(createEvent(PROJECT_NAME, statistics));
 
diff --git a/src/test/java/com/googlesource/gerrit/plugins/quota/RepoSizeEventCreatorTest.java b/src/test/java/com/googlesource/gerrit/plugins/quota/RepoSizeEventCreatorTest.java
index f67f776..fc72e9a 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/quota/RepoSizeEventCreatorTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/quota/RepoSizeEventCreatorTest.java
@@ -75,7 +75,7 @@
 
   @Test
   public void testOneDataPoint() {
-    expect(repoSizeCache.get(p1)).andStubReturn(100l);
+    expect(repoSizeCache.get(p1)).andStubReturn(100L);
     replay(repoSizeCache);
 
     Event event = classUnderTest.create();
@@ -84,7 +84,7 @@
     assertEquals(1, event.getData().size());
     Data dataPoint = event.getData().get(0);
     assertEquals("p1", dataPoint.getProjectName());
-    assertEquals(100l, dataPoint.getValue());
+    assertEquals(100L, dataPoint.getValue());
   }
 
 }