diff --git a/layers/etc/layers.png b/layers/etc/layers.png
new file mode 100644
index 000000000..a4bd8b19d
Binary files /dev/null and b/layers/etc/layers.png differ
diff --git a/layers/etc/layers.ucls b/layers/etc/layers.ucls
new file mode 100644
index 000000000..060b391c0
--- /dev/null
+++ b/layers/etc/layers.ucls
@@ -0,0 +1,256 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<class-diagram version="1.1.8" icons="true" automaticImage="PNG" always-add-relationships="false" generalizations="true" 
+  realizations="true" associations="true" dependencies="false" nesting-relationships="true">  
+  <interface id="1" language="java" name="com.iluwatar.layers.CakeDao" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/CakeDao.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="289" y="916"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </interface>  
+  <class id="2" language="java" name="com.iluwatar.layers.CakeLayer" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/CakeLayer.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="1438" y="826"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </class>  
+  <class id="3" language="java" name="com.iluwatar.layers.CakeViewImpl" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/CakeViewImpl.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="456" y="221"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </class>  
+  <class id="4" language="java" name="com.iluwatar.layers.CakeBakingException" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/CakeBakingException.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="143" y="502"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </class>  
+  <class id="5" language="java" name="com.iluwatar.layers.CakeBakingServiceImpl" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/CakeBakingServiceImpl.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="456" y="694"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </class>  
+  <interface id="6" language="java" name="com.iluwatar.layers.CakeLayerDao" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/CakeLayerDao.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="456" y="918"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </interface>  
+  <interface id="7" language="java" name="com.iluwatar.layers.View" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/View.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="456" y="65"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </interface>  
+  <class id="8" language="java" name="com.iluwatar.layers.CakeToppingInfo" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/CakeToppingInfo.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="817" y="530"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </class>  
+  <class id="9" language="java" name="com.iluwatar.layers.CakeInfo" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/CakeInfo.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="883" y="265"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </class>  
+  <interface id="10" language="java" name="com.iluwatar.layers.CakeToppingDao" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/CakeToppingDao.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="633" y="918"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </interface>  
+  <interface id="11" language="java" name="com.iluwatar.layers.CakeBakingService" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/CakeBakingService.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="456" y="431"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </interface>  
+  <class id="12" language="java" name="com.iluwatar.layers.CakeLayerInfo" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/CakeLayerInfo.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="1055" y="530"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </class>  
+  <class id="13" language="java" name="com.iluwatar.layers.Cake" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/Cake.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="1160" y="826"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </class>  
+  <class id="14" language="java" name="com.iluwatar.layers.CakeTopping" project="layers" 
+    file="/layers/src/main/java/com/iluwatar/layers/CakeTopping.java" binary="false" corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="876" y="826"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </class>  
+  <association id="15">    
+    <end type="SOURCE" refId="9" navigable="false">      
+      <attribute id="16" name="cakeToppingInfo"/>      
+      <multiplicity id="17" minimum="0" maximum="1"/>    
+    </end>    
+    <end type="TARGET" refId="8" navigable="true"/>    
+    <display labels="true" multiplicity="true"/>  
+  </association>  
+  <dependency id="18">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="10"/>  
+  </dependency>  
+  <association id="19">    
+    <end type="SOURCE" refId="13" navigable="false">      
+      <attribute id="20" name="layers"/>      
+      <multiplicity id="21" minimum="0" maximum="2147483647"/>    
+    </end>    
+    <end type="TARGET" refId="2" navigable="true"/>    
+    <display labels="true" multiplicity="true"/>  
+  </association>  
+  <dependency id="22">    
+    <end type="SOURCE" refId="11"/>    
+    <end type="TARGET" refId="4"/>  
+  </dependency>  
+  <realization id="23">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="11"/>  
+  </realization>  
+  <association id="24">    
+    <end type="SOURCE" refId="13" navigable="false">      
+      <attribute id="25" name="topping"/>      
+      <multiplicity id="26" minimum="0" maximum="1"/>    
+    </end>    
+    <end type="TARGET" refId="14" navigable="true"/>    
+    <display labels="true" multiplicity="true"/>  
+  </association>  
+  <association id="27">    
+    <end type="SOURCE" refId="2" navigable="false">      
+      <attribute id="28" name="cake"/>      
+      <multiplicity id="29" minimum="0" maximum="1"/>    
+    </end>    
+    <end type="TARGET" refId="13" navigable="true"/>    
+    <display labels="true" multiplicity="true"/>  
+  </association>  
+  <dependency id="30">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="14"/>  
+  </dependency>  
+  <dependency id="31">    
+    <end type="SOURCE" refId="11"/>    
+    <end type="TARGET" refId="12"/>  
+  </dependency>  
+  <association id="32">    
+    <end type="SOURCE" refId="3" navigable="false">      
+      <attribute id="33" name="cakeBakingService"/>      
+      <multiplicity id="34" minimum="0" maximum="1"/>    
+    </end>    
+    <end type="TARGET" refId="11" navigable="true"/>    
+    <display labels="true" multiplicity="true"/>  
+  </association>  
+  <dependency id="35">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="1"/>  
+  </dependency>  
+  <dependency id="36">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="2"/>  
+  </dependency>  
+  <dependency id="37">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="4"/>  
+  </dependency>  
+  <dependency id="38">    
+    <end type="SOURCE" refId="11"/>    
+    <end type="TARGET" refId="8"/>  
+  </dependency>  
+  <association id="39">    
+    <end type="SOURCE" refId="9" navigable="false">      
+      <attribute id="40" name="cakeLayerInfos"/>      
+      <multiplicity id="41" minimum="0" maximum="2147483647"/>    
+    </end>    
+    <end type="TARGET" refId="12" navigable="true"/>    
+    <display labels="true" multiplicity="true"/>  
+  </association>  
+  <realization id="42">    
+    <end type="SOURCE" refId="3"/>    
+    <end type="TARGET" refId="7"/>  
+  </realization>  
+  <dependency id="43">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="12"/>  
+  </dependency>  
+  <dependency id="44">    
+    <end type="SOURCE" refId="11"/>    
+    <end type="TARGET" refId="9"/>  
+  </dependency>  
+  <association id="45">    
+    <end type="SOURCE" refId="14" navigable="false">      
+      <attribute id="46" name="cake"/>      
+      <multiplicity id="47" minimum="0" maximum="1"/>    
+    </end>    
+    <end type="TARGET" refId="13" navigable="true"/>    
+    <display labels="true" multiplicity="true"/>  
+  </association>  
+  <dependency id="48">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="6"/>  
+  </dependency>  
+  <dependency id="49">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="8"/>  
+  </dependency>  
+  <dependency id="50">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="9"/>  
+  </dependency>  
+  <dependency id="51">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="13"/>  
+  </dependency>  
+  <classifier-display autosize="true" stereotype="true" package="true" initial-value="true" signature="true" 
+    sort-features="false" accessors="true" visibility="true">    
+    <attributes public="true" package="true" protected="true" private="true" static="true"/>    
+    <operations public="true" package="true" protected="true" private="true" static="true"/>  
+  </classifier-display>  
+  <association-display labels="true" multiplicity="true"/>
+</class-diagram>
\ No newline at end of file