вроде связи добавлены

src/main/java/ru/ulstu/is/sbapp/repair/model/Component.java

@@ -18,6 +18,9 @@ public class Component {
     @Column(name = "amount")
     private Integer amount;
 
+    @ManyToMany(mappedBy = "componentsList")
+    private List<Favor> favorsList;
+
     public Component() {
     }
 

src/main/java/ru/ulstu/is/sbapp/repair/model/Favor.java

@@ -18,6 +18,15 @@ public class Favor {
     @Column(name = "price")
     private Integer price;
 
+    @ManyToMany(mappedBy = "favorsList")
+    private List<Order> ordersList;
+
+    @ManyToMany
+    @JoinTable(name = "favor_component",
+            joinColumns = @JoinColumn(name = "favor_fk"),
+            inverseJoinColumns = @JoinColumn(name = "component_fk"))
+    private List<Component> componentsList;
+
     public Favor() {
 
     }

src/main/java/ru/ulstu/is/sbapp/repair/model/Order.java

@@ -16,6 +16,13 @@ public class Order {
     private Long id;
     @Column(name = "date")
     private Date date;
+
+    @ManyToMany
+    @JoinTable(name = "order_favor",
+            joinColumns = @JoinColumn(name = "order_fk"),
+            inverseJoinColumns = @JoinColumn(name = "favor_fk"))
+    private List<Favor> favorsList;
+
     public Order(){
 
     }
@@ -38,7 +45,6 @@ public class Order {
     public void setDate(Date date) {
         this.date = date;
     }
-
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;