add code inspection

.github/workflows/qodana_code_quality.yml

@@ -0,0 +1,19 @@
+name: Qodana
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  qodana:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - name: 'Qodana Scan'
+        uses: JetBrains/qodana-action@v2023.3
+        env:
+          QODANA_TOKEN: ${{ secrets.QODANA_TOKEN }}

pom.xml

@@ -99,6 +99,12 @@
       <artifactId>smack-java8</artifactId>
       <version>4.4.7</version>
     </dependency>
+      <dependency>
+          <groupId>org.jetbrains</groupId>
+          <artifactId>annotations</artifactId>
+          <version>RELEASE</version>
+          <scope>compile</scope>
+      </dependency>
   </dependencies>
 
   <build>

qodana.yaml

@@ -0,0 +1,31 @@
+#-------------------------------------------------------------------------------#
+#               Qodana analysis is configured by qodana.yaml file               #
+#             https://www.jetbrains.com/help/qodana/qodana-yaml.html            #
+#-------------------------------------------------------------------------------#
+version: "1.0"
+
+#Specify inspection profile for code analysis
+profile:
+  name: qodana.starter
+
+#Enable inspections
+#include:
+#  - name: <SomeEnabledInspectionId>
+
+#Disable inspections
+#exclude:
+#  - name: <SomeDisabledInspectionId>
+#    paths:
+#      - <path/where/not/run/inspection>
+
+projectJDK: 21 #(Applied in CI/CD pipeline)
+
+#Execute shell command before Qodana execution (Applied in CI/CD pipeline)
+#bootstrap: sh ./prepare-qodana.sh
+
+#Install IDE plugins before Qodana execution (Applied in CI/CD pipeline)
+#plugins:
+#  - id: <plugin.id> #(plugin id can be found at https://plugins.jetbrains.com)
+
+#Specify Qodana linter for analysis (Applied in CI/CD pipeline)
+linter: jetbrains/qodana-jvm:latest

src/main/java/module-info.java

@@ -13,6 +13,7 @@
     requires smack.extensions;
     requires smack.tcp;
     requires smack.core;
+    requires org.jetbrains.annotations;
 
     opens team.elrant.bubbles.gui to javafx.fxml;
     exports team.elrant.bubbles.gui;

src/main/java/team/elrant/bubbles/gui/HelloApplication.java

@@ -9,7 +9,7 @@
 
 public class HelloApplication extends Application {
     @Override
-    public void start(Stage stage) throws IOException {
+    public void start(@org.jetbrains.annotations.NotNull Stage stage) throws IOException {
         FXMLLoader fxmlLoader = new FXMLLoader(HelloApplication.class.getResource("hello-view.fxml"));
         Scene scene = new Scene(fxmlLoader.load(), 320, 240);
         stage.setTitle("Hello!");