More prefixes added

Author: Rúben André Barreiro

src/main/java/org/quisl/framework/java/registers/common/RegisterUnitPrefixes.java

@@ -0,0 +1,22 @@
+package org.quisl.framework.java.registers.common;
+
+public enum RegisterUnitPrefixes {
+
+    CLASSICAL_REGISTER_UNIT('C'),
+    QUANTUM_REGISTER_UNIT('Q');
+
+    private final Character registerUnitCharacter;
+
+    RegisterUnitPrefixes(Character registerUnitCharacter) {
+
+        this.registerUnitCharacter = registerUnitCharacter;
+
+    }
+
+    public Character getRegisterUnitCharacter() {
+
+        return this.registerUnitCharacter;
+
+    }
+
+}