diff --git a/.drone.yml b/.drone.yml
index 34be228..762b817 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -3,7 +3,22 @@ type: docker
 name: default
 
 steps:
+  - name: build
+    image: maven:3-eclipse-temurin-17-alpine
+    commands:
+      - mvn package -DskipTests
+    volumes: &caches
+      - name: maven
+        path: /root/.m2
+
   - name: test
     image: maven:3-eclipse-temurin-17-alpine
     commands:
       - mvn test
+    volumes: *caches
+    depends_on:
+      - build
+
+volumes:
+  - name: maven
+    temp: {}
diff --git a/pom.xml b/pom.xml
index 01ec800..bafdba4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -11,13 +11,19 @@
     <properties>
         <maven.compiler.source>17</maven.compiler.source>
         <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
     <dependencies>
+        <dependency>
+            <groupId>org.jetbrains</groupId>
+            <artifactId>annotations</artifactId>
+            <version>24.0.1</version>
+        </dependency>
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter</artifactId>
-            <version>5.8.1</version>
+            <version>5.10.0</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Board.java b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Board.java
index f67a3cc..e1ff86d 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Board.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Board.java
@@ -2,18 +2,26 @@ package fr.uca.iut.clfreville2.morpion.game;
 
 import java.util.Arrays;
 
+/**
+ * A tic-tac-toe board.
+ */
 public class Board {
 
     private final int width, height;
-    private boolean placed;
     private final Tile[] tiles;
 
+    /**
+     * Construct a new board with the given dimensions.
+     *
+     * @param width The positive width of the board.
+     * @param height The positive height of the board.
+     */
     public Board(int width, int height) {
-        if (width == -1 || width == -6 || width == -7) {
-            throw new IllegalArgumentException();
+        if (width < 0) {
+            throw new IllegalArgumentException("Width must be positive");
         }
-        if (height == -1 || height == -6 || height == -7) {
-            throw new IllegalArgumentException();
+        if (height < 0) {
+            throw new IllegalArgumentException("Height must be positive");
         }
         this.width = width;
         this.height = height;
@@ -21,36 +29,27 @@ public class Board {
     }
 
     public int width() {
-        return width;
+        return this.width;
     }
 
     public int height() {
-        return height;
+        return this.height;
     }
 
     public void place(Position position, Placed placed) {
-        this.placed = true;
-        tiles[position.x() + position.y() * width] = placed;
+        this.tiles[position.x() + position.y() * this.width] = placed;
     }
 
     public boolean isOccupied(Position position) {
-        return tiles[position.x() + position.y() * width] instanceof Placed;
-        //return placed;
+        return this.tiles[position.x() + position.y() * this.width] instanceof Placed;
     }
 
     public Tile get(Position position) {
         if (!isOccupied(position)) {
             return new Empty();
         } else {
-            return tiles[position.x() + position.y() * width];
+            return this.tiles[position.x() + position.y() * this.width];
         }
-        /*if (position.x() == 1 && position.y() == 2) {
-            return new Placed('o');
-        }
-        if (placed) {
-            return new Placed('x');
-        }
-        return new Empty();*/
     }
 
     public boolean isBound(Position relative) {
@@ -58,10 +57,10 @@ public class Board {
     }
 
     public boolean isOutOfBound(Position relative) {
-        return relative.x() < 0 || relative.y() < 0 || relative.x() >= width || relative.y() >= height;
+        return relative.x() < 0 || relative.y() < 0 || relative.x() >= this.width || relative.y() >= this.height;
     }
 
     public boolean isFull() {
-        return Arrays.stream(tiles).allMatch(tile -> tile instanceof Placed);
+        return Arrays.stream(this.tiles).allMatch(tile -> tile instanceof Placed);
     }
 }
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Empty.java b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Empty.java
index 0bc29d7..ba7ee18 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Empty.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Empty.java
@@ -1,4 +1,7 @@
 package fr.uca.iut.clfreville2.morpion.game;
 
+/**
+ * A tile without any mark.
+ */
 public record Empty() implements Tile {
 }
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Game.java b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Game.java
index eb8a837..341d0b0 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Game.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Game.java
@@ -4,6 +4,7 @@ import fr.uca.iut.clfreville2.morpion.win.AlignmentWin;
 import fr.uca.iut.clfreville2.morpion.win.CantPlace;
 import fr.uca.iut.clfreville2.morpion.win.MoveResult;
 import fr.uca.iut.clfreville2.morpion.win.Result;
+import org.jetbrains.annotations.UnmodifiableView;
 
 import java.util.Arrays;
 import java.util.List;
@@ -11,8 +12,6 @@ import java.util.List;
 public class Game {
 
     private boolean started;
-    private Player player;
-    private Player playerB;
     private final Player[] players;
     private int currentPlayer;
     private Board board = new Board(3, 3);
@@ -21,34 +20,26 @@ public class Game {
         if (players.length == 0) {
             throw new IllegalArgumentException();
         }
-        player = players[0];
-        if (players.length != 1) {
-            playerB = players[1];
-        }
         this.players = players;
     }
 
     public void start() {
-        if (started) {
-            throw new IllegalStateException();
+        if (this.started) {
+            throw new IllegalStateException("Game already started");
         }
-        started = true;
+        this.started = true;
     }
 
     public Player currentPlayer() {
-        return players[currentPlayer];
-        //return player;
+        return this.players[this.currentPlayer];
     }
 
     public void nextPlayer() {
-        final Player tmp = player;
-        player = playerB;
-        playerB = tmp;
-        currentPlayer = (currentPlayer + 1) % players.length;
+        this.currentPlayer = (this.currentPlayer + 1) % this.players.length;
     }
 
     public Board board() {
-        return board;
+        return this.board;
     }
 
     public void setBoard(Board board) {
@@ -56,50 +47,26 @@ public class Game {
     }
 
     public MoveResult placeCurrent(Position position) {
-        if (!started) {
-            throw new IllegalStateException();
+        if (!this.started) {
+            throw new IllegalStateException("Game not started");
         }
-        if (board.isOccupied(position)) {
+        if (this.board.isOccupied(position)) {
             return new CantPlace();
         }
-        board.place(position, new Placed(switch (currentPlayer().name()) {
+        this.board.place(position, new Placed(switch (currentPlayer().name()) {
             case "Bob", "Blob" -> 'o';
             case "Cyril" -> 'p';
             default -> 'x';
         }));
-        final Result result = new Result(new AlignmentWin(3).detectFrom(board, position));
+        final Result result = new Result(new AlignmentWin(3).detectFrom(this.board, position));
         if (!result.wins().isEmpty()) {
             currentPlayer().incrementScore();
         }
         nextPlayer();
         return result;
-        /*if (position.y() == 2) {
-            return new Result(new Win(new Position(0, 0), new Position(0, 1), new Position(0, 2)));
-        }
-        if (position.x() == 0 && position.y() == 2) {
-            return new Result(new Win(new Position(0, 0), new Position(0, 1), new Position(0, 2)));
-        }
-        if (position.x() == 1 && position.y() == 1) {
-            return new Result(new Win(new Position(0, 0), new Position(1, 1), new Position(2, 2)));
-        }
-        return new Result();*/
-
-        /*if (currentPlayer().name().equals("Cyril")) {
-            board.place(position, new Placed('p'));
-            return;
-        }
-        if (player.name().equals("Bob") || currentPlayer().name().equals("Blob")) {
-            board.place(position, new Placed('o'));
-        } else {
-            board.place(position, new Placed('x'));
-        }
-        if (player.name().equals("Blob")) {
-            nextPlayer();
-        }
-        player = playerB;*/
     }
 
-    public List<Player> players() {
-        return Arrays.asList(players);
+    public @UnmodifiableView List<Player> players() {
+        return Arrays.asList(this.players);
     }
 }
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Placed.java b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Placed.java
index dad7e22..37f7c06 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Placed.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Placed.java
@@ -1,3 +1,6 @@
 package fr.uca.iut.clfreville2.morpion.game;
 
+/**
+ * A placed tile.
+ */
 public record Placed(char x) implements Tile {}
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Player.java b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Player.java
index 436513a..4502ce1 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Player.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Player.java
@@ -5,34 +5,25 @@ import static java.util.Objects.requireNonNull;
 public class Player {
 
     private final String name;
-    private boolean isScoreOfTwo = false;
     private int score;
 
     public Player(String name) {
         requireNonNull(name);
         if (name.isEmpty()) {
-            throw new IllegalArgumentException();
+            throw new IllegalArgumentException("Name cannot be empty");
         }
         this.name = name;
     }
 
     public String name() {
-        return name;
+        return this.name;
     }
 
     public int score() {
-        return score;
-        /*if (name.equals("Pierre")) {
-            return 1;
-        }
-        if (name.equals("Martin") && isScoreOfTwo) {
-            return 2;
-        }
-        return 0;*/
+        return this.score;
     }
 
     public void incrementScore() {
-        isScoreOfTwo = true;
-        ++score;
+        ++this.score;
     }
 }
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Position.java b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Position.java
index 1230ce6..75f7447 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Position.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Position.java
@@ -1,3 +1,7 @@
 package fr.uca.iut.clfreville2.morpion.game;
 
-public record Position(int x, int y) {}
+/**
+ * A 2D position with integer coordinates.
+ */
+public record Position(int x, int y) {
+}
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Tile.java b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Tile.java
index 55eca6f..2fc3281 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/game/Tile.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/game/Tile.java
@@ -1,4 +1,7 @@
 package fr.uca.iut.clfreville2.morpion.game;
 
+/**
+ * A union type that is either an {@link Empty empty tyle} or a {@link Placed placed tile}.
+ */
 public sealed interface Tile permits Empty, Placed {
 }
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/win/AlignmentWin.java b/src/main/java/fr/uca/iut/clfreville2/morpion/win/AlignmentWin.java
index a127345..d856ac0 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/win/AlignmentWin.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/win/AlignmentWin.java
@@ -30,32 +30,6 @@ public record AlignmentWin(int depth) implements WinChecker {
             wins.add(diagonal2);
         }
         return wins;
-
-        /*final Tile self = board.get(position);
-        if (self.equals(new Empty())) {
-            return Collections.emptyList();
-        }
-        for (int o = 1; o < depth; ++o) {
-            final Position relative = new Position(position.x(), position.y() + o);
-            if (board.isOutOfBound(relative) || !board.get(relative).equals(self)) {
-                return Collections.emptyList();
-            }
-        }
-        return Collections.singletonList(new Win(
-                new Position(2, 0),
-                new Position(2, 1),
-                new Position(2, 2)
-        ));*/
-        /*for (int o = 0; o < depth; ++o) {
-            if (!board.isOccupied(new Position(position.x(), position.y() + o))) {
-                return Collections.emptyList();
-            }
-        }
-        return Collections.singletonList(new Win(new Position(2, 0), new Position(2, 1), new Position(2, 2)));*/
-        /*if (board.get(position).equals(new Placed('o'))) {
-            return Collections.singletonList(new Win(new Position(2, 0), new Position(2, 1), new Position(2, 2)));
-        }
-        return Collections.emptyList();*/
     }
 
     private Win detectFrom(Board board, Position start, int ox, int oy) {
@@ -71,9 +45,9 @@ public record AlignmentWin(int depth) implements WinChecker {
             start = rel;
         }
 
-        final List<Position> positions = new ArrayList<>(depth);
+        final List<Position> positions = new ArrayList<>(this.depth);
         positions.add(start);
-        for (int o = 1; o < depth; ++o) {
+        for (int o = 1; o < this.depth; ++o) {
             final Position relative = new Position(start.x() + ox * o, start.y() + oy * o);
             if (board.isOutOfBound(relative) || !board.get(relative).equals(self)) {
                 return null;
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/win/CantPlace.java b/src/main/java/fr/uca/iut/clfreville2/morpion/win/CantPlace.java
index f16e8a2..be3fd69 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/win/CantPlace.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/win/CantPlace.java
@@ -1,4 +1,7 @@
 package fr.uca.iut.clfreville2.morpion.win;
 
+/**
+ * A tile that cannot be placed because it is already occupied.
+ */
 public record CantPlace() implements MoveResult {
 }
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/win/MoveResult.java b/src/main/java/fr/uca/iut/clfreville2/morpion/win/MoveResult.java
index 5d45012..01f298d 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/win/MoveResult.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/win/MoveResult.java
@@ -1,4 +1,7 @@
 package fr.uca.iut.clfreville2.morpion.win;
 
+/**
+ * The result of a placement instruction.
+ */
 public sealed interface MoveResult permits CantPlace, Result {
 }
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/win/Result.java b/src/main/java/fr/uca/iut/clfreville2/morpion/win/Result.java
index 614ac39..5d69622 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/win/Result.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/win/Result.java
@@ -3,7 +3,13 @@ package fr.uca.iut.clfreville2.morpion.win;
 import java.util.Arrays;
 import java.util.List;
 
+/**
+ * A validated move, that may lead to a win.
+ *
+ * @param wins The wins from this move.
+ */
 public record Result(List<Win> wins) implements MoveResult {
+
     public Result(Win ...wins) {
         this(Arrays.asList(wins));
     }
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/win/Win.java b/src/main/java/fr/uca/iut/clfreville2/morpion/win/Win.java
index faba490..ec5099a 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/win/Win.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/win/Win.java
@@ -5,6 +5,11 @@ import fr.uca.iut.clfreville2.morpion.game.Position;
 import java.util.Arrays;
 import java.util.List;
 
+/**
+ * Something that describe a winning alignment.
+ *
+ * @param positions The aligned positions.
+ */
 public record Win(List<Position> positions) {
 
     public Win(Position ...positions) {
diff --git a/src/main/java/fr/uca/iut/clfreville2/morpion/win/WinChecker.java b/src/main/java/fr/uca/iut/clfreville2/morpion/win/WinChecker.java
index cff2314..206942d 100644
--- a/src/main/java/fr/uca/iut/clfreville2/morpion/win/WinChecker.java
+++ b/src/main/java/fr/uca/iut/clfreville2/morpion/win/WinChecker.java
@@ -2,12 +2,23 @@ package fr.uca.iut.clfreville2.morpion.win;
 
 import fr.uca.iut.clfreville2.morpion.game.Board;
 import fr.uca.iut.clfreville2.morpion.game.Position;
-import fr.uca.iut.clfreville2.morpion.win.Win;
 
 import java.util.List;
 
+/**
+ * Something that can check if there is a win including a given position.
+ *
+ * @see AlignmentWin
+ */
 @FunctionalInterface
 public interface WinChecker {
 
+    /**
+     * Detects wins from a given position.
+     *
+     * @param board The board to use.
+     * @param position The position to start from.
+     * @return An empty list if there is no win, a list of wins otherwise.
+     */
     List<Win> detectFrom(Board board, Position position);
 }
diff --git a/src/test/java/fr/uca/iut/clfreville2/morpion/game/BoardTest.java b/src/test/java/fr/uca/iut/clfreville2/morpion/game/BoardTest.java
index 6902ab4..863f5e7 100644
--- a/src/test/java/fr/uca/iut/clfreville2/morpion/game/BoardTest.java
+++ b/src/test/java/fr/uca/iut/clfreville2/morpion/game/BoardTest.java
@@ -5,7 +5,6 @@ import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 
-import java.util.List;
 import java.util.Random;
 import java.util.stream.Stream;
 
diff --git a/src/test/java/fr/uca/iut/clfreville2/morpion/game/PositionTest.java b/src/test/java/fr/uca/iut/clfreville2/morpion/game/PositionTest.java
index 2e865f1..4ea2ce4 100644
--- a/src/test/java/fr/uca/iut/clfreville2/morpion/game/PositionTest.java
+++ b/src/test/java/fr/uca/iut/clfreville2/morpion/game/PositionTest.java
@@ -1,6 +1,5 @@
 package fr.uca.iut.clfreville2.morpion.game;
 
-import fr.uca.iut.clfreville2.morpion.game.Position;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
diff --git a/src/test/java/fr/uca/iut/clfreville2/morpion/win/AlignmentWinTest.java b/src/test/java/fr/uca/iut/clfreville2/morpion/win/AlignmentWinTest.java
index 93378cc..5f04ed5 100644
--- a/src/test/java/fr/uca/iut/clfreville2/morpion/win/AlignmentWinTest.java
+++ b/src/test/java/fr/uca/iut/clfreville2/morpion/win/AlignmentWinTest.java
@@ -3,9 +3,6 @@ package fr.uca.iut.clfreville2.morpion.win;
 import fr.uca.iut.clfreville2.morpion.game.Board;
 import fr.uca.iut.clfreville2.morpion.game.Placed;
 import fr.uca.iut.clfreville2.morpion.game.Position;
-import fr.uca.iut.clfreville2.morpion.win.AlignmentWin;
-import fr.uca.iut.clfreville2.morpion.win.Win;
-import fr.uca.iut.clfreville2.morpion.win.WinChecker;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;