Added Checkstyle to Transaction

src/main/java/Model/Transaction.java

@@ -1,42 +1,46 @@
 package Model;
+
+/**
+ * Transaction class.
+ */
 public abstract class Transaction {
-    private Share share;
-    private int week;
-    private TransactionCalculator calculator;
-    protected boolean committed;
-
-    protected Transaction(Share share, int week, TransactionCalculator calculator) {
-        if (share == null) {
-            throw new IllegalArgumentException("Share cannot be null");
-        }
-        if (week < 1) {
-            throw new IllegalArgumentException("Week must be at least 1");
-        }
-        if (calculator == null) {
-            throw new IllegalArgumentException("Calculator cannot be null");
-        }
-
-        this.share = share;
-        this.week = week;
-        this.calculator = calculator;
-    }
+  private Share share;
+  private int week;
+  private TransactionCalculator calculator;
+  protected boolean committed;
 
-    public Share getShare() {
-        return this.share;
+  protected Transaction(Share share, int week, TransactionCalculator calculator) {
+    if (share == null) {
+      throw new IllegalArgumentException("Share cannot be null");
     }
-
-    public int getWeek() {
-        return this.week;
+    if (week < 1) {
+      throw new IllegalArgumentException("Week must be at least 1");
     }
-
-    public TransactionCalculator getCalculator() {
-        return this.calculator;
+    if (calculator == null) {
+      throw new IllegalArgumentException("Calculator cannot be null");
     }
 
-    public boolean isCommitted() {
-        return this.committed;
-    }
+    this.share = share;
+    this.week = week;
+    this.calculator = calculator;
+  }
+
+  public Share getShare() {
+    return this.share;
+  }
+
+  public int getWeek() {
+    return this.week;
+  }
+
+  public TransactionCalculator getCalculator() {
+    return this.calculator;
+  }
+
+  public boolean isCommitted() {
+    return this.committed;
+  }
 
-    public abstract void commit(Player player);
+  public abstract void commit(Player player);
 
 }