Makes some particle classes final

src/main/java/net/knarcraft/knarlib/particle/ParticleConfig.java

@@ -8,7 +8,7 @@ import org.jetbrains.annotations.NotNull;
  * A configuration describing a particle
  */
 @SuppressWarnings("unused")
-public class ParticleConfig {
+public final class ParticleConfig {
 
     private final ParticleMode particleMode;
     private final Particle particleType;

src/main/java/net/knarcraft/knarlib/particle/ParticleSpawner.java

@@ -16,7 +16,7 @@ import java.util.function.Supplier;
  * A runnable tasks that spawns particles at the given blocks
  */
 @SuppressWarnings("unused")
-public class ParticleSpawner implements Runnable {
+public final class ParticleSpawner implements Runnable {
 
     private final ParticleConfig particleConfig;
     private final Map<Material, ParticleConfig> materialConfigs;

src/main/java/net/knarcraft/knarlib/particle/ParticleTrailSpawner.java

@@ -20,7 +20,7 @@ import java.util.UUID;
  * A task for spawning trails behind players
  */
 @SuppressWarnings("unused")
-public class ParticleTrailSpawner implements Runnable {
+public final class ParticleTrailSpawner implements Runnable {
 
     private final Set<UUID> playersWithTrails = new HashSet<>();
     private final Map<UUID, Particle> playerParticles = new HashMap<>();