Changed descriptions for most files

Brought in-line to the docstrings

docs/system/ECSSystem.md

@@ -30,19 +30,20 @@ public ECSSystem(){}
 <br>
 
 ## Methods
+> These two functions are labelled as abstract (must be implemented) to indicate the type of implementation required.
+> It is not required to add functionality to them. Parametrised versions can also be added.
 ### init
 ``` java
-public void init(){}
+abstract void init();
 ```
 Functionality that needs to occur at the initialisation of the system should be performed here
 * `init()` should be called only once, before the system is utilised
-* An example of the type of call that could be made here is opening a file
 
 <br>
 
 ### update
 ``` java
-public void update(){}
+abstract void update();
 ```
 Functionality that needs to be called regularly should be defined here
 * `update()` is intended to be called regularly

docs/system/SystemManager.md

@@ -18,63 +18,68 @@ Before attempting to use a system, it must be registered.
 
 Registration requires a call to `registerSystem(String systemName, ECSSystem system)`, with params of the `String name` and a object reference of the [ECSSystem](./ECSSystem.md). Using the object reference, a system can be invoked at any time.
 
+See [SystemManager.java](/BrychanD/JavaECS/src/branch/master/javaecs/src/main/java/nz/ac/massey/javaecs/SystemManager.java) for the full implementation.
+
 ## Constructors
 Default constructor
 ``` java
 public SystemManager(){}
 ```
+
 <br>
 
 ## Methods
 
 ### entityDestroyed
 ``` java
-public void entityDestroyed(int entity);
+protected void entityDestroyed(int entity);
 ```
-Removes the specified entity from every system, if it was associated
+Signals the SystemManager that an entity was destroyed. Removes the entity from each system's tracked entities
 
 <br>
 
 ### entitySignatureChanged
 ``` java
-public void entitySignatureChanged(int entity, BitSet entitySignature);
+protected void entityRegistrationsChanged(int entity, BitSet entityRegistrations);
 ```
-Checks the entity's new signature against the current registrations. Registers the entity if it wasn't previously registered, or removes it if it is no longer registered.
+Signals the SystemManager that an entity had its registrations changed; iterates through each system validating the entities list
 
 <br>
 
 ### registerSystem
 ``` java
-public boolean registerSystem(String systemName, ECSSystem system);
+protected boolean registerSystem(Type systemType, ECSSystem system);
 ```
 Registers the specified system name and system reference to this manager.
 
-*adds a `systemName:system` pair to [systems](#systems)*
+*adds a `systemType:system` pair to [systems](#systems)*
 
-*and a `systemName:new BitSet()` pair to [signatures](#signatures)*
+*adds a `systemType:new BitSet()` pair to [registrationSignatures](#registrationSignatures)*
 
 <br>
 
 ### setSignature
 ``` java
-public void setSignature(String system, BitSet registrations);
+protected void setRegistrationSignature(Type systemType, BitSet registrations);
 ```
-Sets the required signature of the `system`
+Sets the registrations the system requires
 
 <br>
 
 ## Fields
-### signatures
+### registrationSignatures
 ``` java
-Map<String, BitSet> signatures = new HashMap<>();
+private Map<Type, BitSet> registrationSignatures = new HashMap<>()
 ```
+The mapped list of required registrations
 
 <br>
 
 ### systems
 ``` java
-Map<String, ECSSystem> systems = new HashMap<>();
+private Map<Type, ECSSystem> systems = new HashMap<>();
 ```
+The mapped list of system instances
 
 <br>
 

docs/system/dir.md

@@ -1,7 +1,10 @@
 *| [JavaECS](../README.md) | [docs](../overview.md) | system*
 # Overview
-| **In this folder** |
-|-|
-| [ECSSystem.md](./ECSSystem.md) |
-| [System.md](./System.md) |
-| [SystemManager.md](./SystemManager.md) |
+### In this folder
+* [ECSSystem.md](./ECSSystem.md)
+* [System.md](./System.md)
+* [SystemManager.md](./SystemManager.md)
+
+### See source files:
+* [ECSSystem.java](/BrychanD/JavaECS/src/branch/master/javaecs/src/main/java/nz/ac/massey/javaecs/ECSSystem.java)
+* [SystemManager.java](/BrychanD/JavaECS/src/branch/master/javaecs/src/main/java/nz/ac/massey/javaecs/SystemManager.java)