fix checkstyle and add javadoc to certain model classes

src/main/java/edu/ntnu/idi/idatt2003/gruppe42/model/exceptions/StockFileParseException.java

@@ -1,15 +1,22 @@
 package edu.ntnu.idi.idatt2003.gruppe42.model.exceptions;
 
+/**
+ * Exception thrown when an error occurs while parsing a stock file.
+ *
+ * <p>This exception includes information about the line number and the content
+ * of the line where the parsing error occurred.
+ */
 public class StockFileParseException extends Exception {
-  private final int lineNumber;
-  private final String lineContent;
 
+  /**
+   * Creates a new StockFileParseException with details about the parsing error.
+   *
+   * @param lineNumber the line number where the error occurred
+   * @param lineContent the content of the line that caused the error
+   * @param reason a description of why the parsing failed
+   */
   public StockFileParseException(int lineNumber, String lineContent, String reason) {
-    super(String.format("Parse error on line %d: %s%n  Content : \"%s\"", lineNumber, reason, lineContent));
-    this.lineNumber = lineNumber;
-    this.lineContent = lineContent;
+    super(String.format("Parse error on line %d: %s%n  Content : \"%s\"",
+            lineNumber, reason, lineContent));
   }
-
-  public int getLineNumber() { return lineNumber; }
-  public String getLineContent() { return lineContent; }
 }

src/main/java/edu/ntnu/idi/idatt2003/gruppe42/model/transaction/Purchase.java

@@ -1,20 +1,37 @@
 package edu.ntnu.idi.idatt2003.gruppe42.model.transaction;
 
-import edu.ntnu.idi.idatt2003.gruppe42.model.calculator.PurchaseCalculator;
 import edu.ntnu.idi.idatt2003.gruppe42.model.Player;
 import edu.ntnu.idi.idatt2003.gruppe42.model.Share;
+import edu.ntnu.idi.idatt2003.gruppe42.model.calculator.PurchaseCalculator;
 
-/** Represents a stock purchase. */
+/**
+ * Represents a stock purchase transaction.
+ *
+ * <p>A purchase withdraws money from a player based on the calculated total cost
+ * and records the transaction in the player's transaction archive.
+ */
 public final class Purchase extends Transaction {
-  /** Constructs a purchase. */
+
+  /**
+   * Constructs a new purchase transaction for a given share and week.
+   *
+   * @param share the share being purchased
+   * @param week the week in which the purchase occurs
+   */
   public Purchase(final Share share, final int week) {
     super(share, week, new PurchaseCalculator(share));
   }
 
-  /** Commits the purchase. */
+  /**
+   * Commits the purchase transaction.
+   *
+   * <p>This method withdraws the total cost from the player and adds the transaction
+   * to the player's transaction archive. The transaction is marked as committed.
+   *
+   * @param player the player executing the purchase
+   */
   @Override
-  public void commit(final Player player) throws Exception {
-    setCommitted(true);
+  public void commit(final Player player) {
     player.withdrawMoney(getCalculator().calculateTotal());
     player.getTransactionArchive().add(this);
   }

src/main/java/edu/ntnu/idi/idatt2003/gruppe42/model/transaction/Sale.java

@@ -1,20 +1,37 @@
 package edu.ntnu.idi.idatt2003.gruppe42.model.transaction;
 
-import edu.ntnu.idi.idatt2003.gruppe42.model.calculator.SaleCalculator;
 import edu.ntnu.idi.idatt2003.gruppe42.model.Player;
 import edu.ntnu.idi.idatt2003.gruppe42.model.Share;
+import edu.ntnu.idi.idatt2003.gruppe42.model.calculator.SaleCalculator;
 
-/** Represents a stock sale. */
+/**
+ * Represents a stock sale transaction.
+ *
+ * <p>A sale adds money to a player based on the calculated total value of the share
+ * and records the transaction in the player's transaction archive.
+ */
 public final class Sale extends Transaction {
-  /** Constructs a sale. */
+
+  /**
+   * Constructs a new sale transaction for a given share and week.
+   *
+   * @param share the share being sold
+   * @param week the week in which the sale occurs
+   */
   public Sale(final Share share, final int week) {
     super(share, week, new SaleCalculator(share));
   }
 
-  /** Commits the sale. */
+  /**
+   * Commits the sale transaction.
+   *
+   * <p>This method adds the total value of the sale to the player and records the
+   * transaction in the player's transaction archive. The transaction is marked as committed.
+   *
+   * @param player the player executing the sale
+   */
   @Override
   public void commit(final Player player) {
-    setCommitted(true);
     player.addMoney(getCalculator().calculateTotal());
     player.getTransactionArchive().add(this);
   }

src/main/java/edu/ntnu/idi/idatt2003/gruppe42/model/transaction/Transaction.java

@@ -1,17 +1,28 @@
 package edu.ntnu.idi.idatt2003.gruppe42.model.transaction;
 
-import edu.ntnu.idi.idatt2003.gruppe42.model.calculator.TransactionCalculator;
 import edu.ntnu.idi.idatt2003.gruppe42.model.Player;
 import edu.ntnu.idi.idatt2003.gruppe42.model.Share;
+import edu.ntnu.idi.idatt2003.gruppe42.model.calculator.TransactionCalculator;
 
-/** Base class for transactions. */
+/**
+ * Base class for all stock-related transactions.
+ *
+ * <p>A transaction represents an action involving a {@link Share} performed by a {@link Player}
+ * at a specific week. Subclasses define the specific behavior of committing the transaction,
+ * such as buying or selling shares.
+ */
 public abstract class Transaction {
   private final Share share;
   private final int week;
   private final TransactionCalculator calculator;
-  private boolean committed = false;
 
-  /** Constructs a new transaction. */
+  /**
+   * Constructs a new transaction.
+   *
+   * @param share the share involved in the transaction
+   * @param week the week when the transaction occurs
+   * @param calculator the calculator used to compute transaction values
+   */
   protected Transaction(
       final Share share,
       final int week,
@@ -20,34 +31,27 @@ protected Transaction(
     this.share = share;
     this.week = week;
     this.calculator = calculator;
-    this.committed = false;
   }
 
-  /** @return the share. */
   public Share getShare() {
     return share;
   }
 
-  /** @return the week. */
   public int getWeek() {
     return week;
   }
 
-  /** @return the calculator. */
   public TransactionCalculator getCalculator() {
     return calculator;
   }
 
-  /** @return true if committed. */
-  public boolean isCommitted() {
-    return committed;
-  }
-
-  /** Commits the transaction. */
+  /**
+   * Commits the transaction for the given player.
+   *
+   * <p>Subclasses define the specific behavior (e.g., buying or selling shares).
+   *
+   * @param player the player executing the transaction
+   * @throws Exception if the transaction cannot be completed
+   */
   public abstract void commit(Player player) throws Exception;
-
-  /** Sets committed status. */
-  public void setCommitted(final boolean committed) {
-    this.committed = committed;
-  }
 }

src/main/java/edu/ntnu/idi/idatt2003/gruppe42/model/transaction/TransactionArchive.java

@@ -6,17 +6,29 @@
 import java.util.List;
 import java.util.Set;
 
-/** Archive for past transactions. */
+/**
+ * Archive for storing and managing past transactions.
+ *
+ * <p>The archive keeps track of all {@link Transaction} objects and provides
+ * utility methods for filtering and analyzing them by week, type, and
+ * financial impact.
+ */
 public final class TransactionArchive {
-  /** The list of stored transactions. */
   private final List<Transaction> transactions;
 
-  /** Constructs an empty archive. */
+  /**
+   * Constructs an empty transaction archive.
+   */
   public TransactionArchive() {
     this.transactions = new ArrayList<>();
   }
 
-  /** Adds a transaction. */
+  /**
+   * Adds a transaction to the archive.
+   *
+   * @param transaction the transaction to add
+   * @return true if the transaction was successfully added, false if null
+   */
   public boolean add(final Transaction transaction) {
     if (transaction == null) {
       return false;
@@ -25,12 +37,21 @@ public boolean add(final Transaction transaction) {
     }
   }
 
-  /** @return true if empty. */
+  /**
+   * Checks whether the archive contains no transactions.
+   *
+   * @return true if the archive is empty, false otherwise
+   */
   public boolean isEmpty() {
     return transactions.isEmpty();
   }
 
-  /** @return transactions for given week. */
+  /**
+   * Returns all transactions that occurred in a specific week.
+   *
+   * @param week the week to filter by
+   * @return a list of transactions in the given week
+   */
   public List<Transaction> getTransactions(final int week) {
     List<Transaction> transactionsThisWeek = new ArrayList<>();
 
@@ -43,7 +64,12 @@ public List<Transaction> getTransactions(final int week) {
     return transactionsThisWeek;
   }
 
-  /** @return purchases for given week. */
+  /**
+   * Returns all purchase transactions for a given week.
+   *
+   * @param week the week to filter by
+   * @return a list of purchases in the given week
+   */
   public List<Purchase> getPurchases(final int week) {
     List<Purchase> purchasesThisWeek = new ArrayList<>();
 
@@ -56,7 +82,12 @@ public List<Purchase> getPurchases(final int week) {
     return purchasesThisWeek;
   }
 
-  /** @return sales for given week. */
+  /**
+   * Returns all sale transactions for a given week.
+   *
+   * @param week the week to filter by
+   * @return a list of sales in the given week
+   */
   public List<Sale> getSales(final int week) {
     List<Sale> salesThisWeek = new ArrayList<>();
 
@@ -69,7 +100,11 @@ public List<Sale> getSales(final int week) {
     return salesThisWeek;
   }
 
-  /** @return distinct weeks count. */
+  /**
+   * Counts the number of distinct weeks that contain transactions.
+   *
+   * @return the number of unique weeks with transactions
+   */
   public int countDistinctWeeks() {
     Set<Integer> distinctWeeks = new HashSet<>();
 
@@ -81,10 +116,12 @@ public int countDistinctWeeks() {
   }
 
   /**
-   * Calculates net income for a given week.
+   * Calculates the net income for a given week.
+   *
+   * <p>Sales increase income, while purchases decrease it.
    *
    * @param week the week to calculate for
-   * @return net income
+   * @return the net income as a BigDecimal
    */
   public BigDecimal calculateNetIncome(final int week) {
     BigDecimal net = BigDecimal.ZERO;