Fix Java coding style issues.

Change-Id: Ia96eea44a8e7d835bb0d116cbc3a603fbb033693
diff --git a/src/main/java/com/googlesource/gerrit/plugins/findowners/OwnersDb.java b/src/main/java/com/googlesource/gerrit/plugins/findowners/OwnersDb.java
index 4f0f6f6..f13c3cf 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/findowners/OwnersDb.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/findowners/OwnersDb.java
@@ -125,9 +125,9 @@
   }
 
   void addPreferredEmails(Set<String> ownerEmails) {
-    List<String> owners = new ArrayList<String>(ownerEmails);
+    List<String> owners = new ArrayList<>(ownerEmails);
     owners.removeIf(o -> preferredEmails.get(o) != null);
-    if (owners.size() > 0) {
+    if (!owners.isEmpty()) {
       String[] emails = new String[owners.size()];
       owners.toArray(emails);
       Multimap<String, Account.Id> email2ids = null;
diff --git a/src/test/java/com/googlesource/gerrit/plugins/findowners/FindOwnersIT.java b/src/test/java/com/googlesource/gerrit/plugins/findowners/FindOwnersIT.java
index 571c0c5..9ab3e48 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/findowners/FindOwnersIT.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/findowners/FindOwnersIT.java
@@ -32,7 +32,6 @@
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.reviewdb.client.Project;
 import com.google.gerrit.reviewdb.client.RefNames;
-import com.google.gerrit.server.account.Accounts;
 import com.google.gerrit.server.change.ChangeResource;
 import com.google.gerrit.server.config.PluginConfigFactory;
 import com.google.inject.Inject;
@@ -48,7 +47,6 @@
 @TestPlugin(name = "find-owners", sysModule = "com.googlesource.gerrit.plugins.findowners.Module")
 public class FindOwnersIT extends LightweightPluginDaemonTest {
 
-  @Inject private Accounts accounts;
   @Inject private PluginConfigFactory configFactory;
 
   @Test
@@ -180,7 +178,7 @@
     String[] emails2 = {"abc@goog.com", "abc+xyz2@g.com", "xyz-team@goog.com"};
     // Create accounts with given user name, first and second email addresses.
     for (int i = 0; i < users.length; i++) {
-      Account.Id id = accountCreator.create(users[i], emails1[i], "FullName " + users[i]).getId();
+      accountCreator.create(users[i], emails1[i], "FullName " + users[i]).getId();
       EmailInput input = new EmailInput();
       input.email = emails2[i];
       input.noConfirmation = true;
@@ -195,10 +193,10 @@
       Collection<Account.Id> ids2 = accounts.byEmail(emails2[i]);
       Collection<Account.Id> ids3 = map1.get(emails1[i]);
       Collection<Account.Id> ids4 = map2.get(emails2[i]);
-      assertThat(ids1.size()).isEqualTo(1);
-      assertThat(ids2.size()).isEqualTo(1);
-      assertThat(ids3.size()).isEqualTo(1);
-      assertThat(ids4.size()).isEqualTo(1);
+      assertThat(ids1).hasSize(1);
+      assertThat(ids2).hasSize(1);
+      assertThat(ids3).hasSize(1);
+      assertThat(ids4).hasSize(1);
       Account.Id id1 = ids1.iterator().next();
       Account.Id id2 = ids2.iterator().next();
       Account.Id id3 = ids3.iterator().next();
@@ -213,8 +211,8 @@
     String[] wrongEmails = {"nobody", "@g.com", "nobody@g.com", "*"};
     Multimap<String, Account.Id> email2ids = accounts.byEmails(wrongEmails);
     for (String email : wrongEmails) {
-      assertThat(accounts.byEmail(email).size()).isEqualTo(0);
-      assertThat(email2ids.get(email).size()).isEqualTo(0);
+      assertThat(accounts.byEmail(email)).isEmpty();
+      assertThat(email2ids.get(email)).isEmpty();
     }
   }