cleanup: Minor cleanup to address manager (#372)

Co-authored-by: Maurelian <maurelian@protonmail.ch>

packages/contracts/contracts/optimistic-ethereum/libraries/resolver/Lib_AddressManager.sol

@@ -18,9 +18,10 @@ contract Lib_AddressManager is Ownable {
         address _newAddress
     );
 
-    /*******************************************
-     * Contract Variables: Internal Accounting *
-     *******************************************/
+
+    /*************
+     * Variables *
+     *************/
 
     mapping (bytes32 => address) private addresses;
 
@@ -29,6 +30,11 @@ contract Lib_AddressManager is Ownable {
      * Public Functions *
      ********************/
 
+    /**
+     * Changes the address associated with a particular name.
+     * @param _name String name to associate an address with.
+     * @param _address Address to associate with the name.
+     */
     function setAddress(
         string memory _name,
         address _address
@@ -36,16 +42,27 @@ contract Lib_AddressManager is Ownable {
         public
         onlyOwner
     {
-        emit AddressSet(_name, _address);
         addresses[_getNameHash(_name)] = _address;
+
+        emit AddressSet(
+            _name,
+            _address
+        );
     }
 
+    /**
+     * Retrieves the address associated with a given name.
+     * @param _name Name to retrieve an address for.
+     * @return Address associated with the given name.
+     */
     function getAddress(
         string memory _name
     )
         public
         view
-        returns (address)
+        returns (
+            address
+        )
     {
         return addresses[_getNameHash(_name)];
     }
@@ -55,13 +72,18 @@ contract Lib_AddressManager is Ownable {
      * Internal Functions *
      **********************/
 
+    /**
+     * Computes the hash of a name.
+     * @param _name Name to compute a hash for.
+     * @return Hash of the given name.
+     */
     function _getNameHash(
         string memory _name
     )
         internal
         pure
         returns (
-            bytes32 _hash
+            bytes32
         )
     {
         return keccak256(abi.encodePacked(_name));