Fix quality flaws

plugins/sonar-core-plugin/src/main/java/org/sonar/plugins/core/issue/notification/IssueChangesEmailTemplate.java

@@ -19,7 +19,6 @@
  */
 package org.sonar.plugins.core.issue.notification;
 
-import com.google.common.base.Objects;
 import com.google.common.base.Strings;
 import org.apache.commons.lang.StringUtils;
 import org.sonar.api.config.EmailSettings;
@@ -39,7 +38,6 @@ import javax.annotation.Nullable;
 public class IssueChangesEmailTemplate extends EmailTemplate {
 
   private static final char NEW_LINE = '\n';
-
   private final EmailSettings settings;
   private final UserFinder userFinder;
 

sonar-core/src/main/java/org/sonar/core/issue/db/IssueDto.java

@@ -29,6 +29,7 @@ import org.sonar.api.utils.KeyValueFormat;
 
 import javax.annotation.CheckForNull;
 import javax.annotation.Nullable;
+
 import java.io.Serializable;
 import java.util.Date;
 
@@ -366,7 +367,7 @@ public final class IssueDto implements Serializable {
       .setComponentId(componentId)
       .setRootComponentId(rootComponentId)
       .setActionPlanKey(issue.actionPlanKey())
-      .setIssueAttributes(issue.attributes() != null ? KeyValueFormat.format(issue.attributes()) : "")
+      .setIssueAttributes(KeyValueFormat.format(issue.attributes()))
       .setAuthorLogin(issue.authorLogin())
       .setIssueCreationDate(issue.creationDate())
       .setIssueCloseDate(issue.closeDate())
@@ -391,7 +392,7 @@ public final class IssueDto implements Serializable {
       .setReporter(issue.reporter())
       .setAssignee(issue.assignee())
       .setActionPlanKey(issue.actionPlanKey())
-      .setIssueAttributes(issue.attributes() != null ? KeyValueFormat.format(issue.attributes()) : "")
+      .setIssueAttributes(KeyValueFormat.format(issue.attributes()))
       .setAuthorLogin(issue.authorLogin())
       .setIssueCreationDate(issue.creationDate())
       .setIssueCloseDate(issue.closeDate())

sonar-core/src/main/java/org/sonar/core/user/UserDao.java

@@ -25,7 +25,7 @@ import org.sonar.api.user.UserQuery;
 import org.sonar.core.persistence.MyBatis;
 
 import javax.annotation.CheckForNull;
-import java.util.Collection;
+
 import java.util.List;
 
 /**

sonar-plugin-api/src/main/java/org/sonar/api/issue/action/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+@ParametersAreNonnullByDefault
+package org.sonar.api.issue.action;
+
+import javax.annotation.ParametersAreNonnullByDefault;

sonar-plugin-api/src/main/java/org/sonar/api/issue/condition/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+@ParametersAreNonnullByDefault
+package org.sonar.api.issue.condition;
+
+import javax.annotation.ParametersAreNonnullByDefault;

sonar-plugin-api/src/main/java/org/sonar/api/issue/internal/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+@ParametersAreNonnullByDefault
+package org.sonar.api.issue.internal;
+
+import javax.annotation.ParametersAreNonnullByDefault;

sonar-plugin-api/src/main/java/org/sonar/api/user/UserFinder.java

@@ -22,7 +22,7 @@ package org.sonar.api.user;
 import org.sonar.api.ServerComponent;
 
 import javax.annotation.CheckForNull;
-import java.util.Collection;
+
 import java.util.List;
 
 /**