Add jetbrains annotations

Author: Syrent

pom.xml

@@ -24,6 +24,11 @@
         </repository>
     </repositories>
     <dependencies>
+        <dependency>
+            <groupId>org.jetbrains</groupId>
+            <artifactId>annotations</artifactId>
+            <version>24.1.0</version>
+        </dependency>
     </dependencies>
   <build>
     <pluginManagement>

src/main/java/ir/xenoncommunity/utils/CommandLineParser.java

@@ -1,12 +1,16 @@
 package ir.xenoncommunity.utils;
 
+import org.jetbrains.annotations.Nullable;
+
 public class CommandLineParser {
+
 	private final String[] args;
 
 	public CommandLineParser(String[] args) {
 		this.args = args;
 	}
 
+	@Nullable
 	public <T> T get(String arg, Class<T> type) {
 		for (int i = 0; i < args.length - 1; i++) {
 			if (args[i].equals(arg)) {