Fix warnings about member hiding

The member 'message' in the exception classes was hiding the member
with the same name in the superclass BuiltinException.

Change-Id: Ia302d49574253d7270642b38510a6fbfb0a15f4d

src/exceptions/ExistenceException.java

diff --git a/src/exceptions/ExistenceException.java b/src/exceptions/ExistenceException.java
index 3741b59..96de890 100644
--- a/src/exceptions/ExistenceException.java
+++ b/src/exceptions/ExistenceException.java
@@ -30,14 +30,14 @@
     public Term   culprit;
 
     /** Holds a string representation of detail message. */
-    public String message;
+    public String msg;
 
     /** Constructs a new <code>ExistenceException</code>
      * with a object type, its culprit, and message. */
     public ExistenceException(String _objType, Term _culprit, String _message) {
 	objType    = _objType;
 	culprit    = _culprit;
-	message    = _message;
+	msg        = _message;
     }
 
     /** Constructs a new <code>ExistenceException</code> 
@@ -47,7 +47,7 @@
 	this.argNo = _argNo;
 	objType    = _objType;
 	culprit    = _culprit;
-	message    = _message;
+	msg        = _message;
     }
 
     /** Returns a term representation of this <code>ExistenceException</code>:
@@ -60,7 +60,7 @@
 	    new IntegerTerm(argNo),
 	    SymbolTerm.create(objType),
 	    culprit,
-	    SymbolTerm.create(message)};
+	    SymbolTerm.create(msg)};
 	return new StructureTerm(EXISTENCE_ERROR, args);
     }
 

src/exceptions/PermissionException.java

diff --git a/src/exceptions/PermissionException.java b/src/exceptions/PermissionException.java
index 03c1c49..d77d565 100644
--- a/src/exceptions/PermissionException.java
+++ b/src/exceptions/PermissionException.java
@@ -37,7 +37,7 @@
     public Term culprit;
 
     /** Holds a string representation of detail message. */
-    public String message;
+    public String msg;
 
     /** Constructs a new <code>PermissionException</code>
      * with the given arguments. */
@@ -50,7 +50,7 @@
 	operation = _operation;
 	permissionType   = _permissionType;
 	culprit   = _culprit;
-	message   = _message;
+	msg       = _message;
     }
 
     /** Returns a term representation of this <code>PermissionException</code>:
@@ -63,7 +63,7 @@
 	    SymbolTerm.create(operation),
 	    SymbolTerm.create(permissionType),
 	    culprit,
-	    SymbolTerm.create(message)};
+	    SymbolTerm.create(msg)};
 	return new StructureTerm(PERMISSION_ERROR, args);
     }
 
@@ -72,7 +72,7 @@
     public String toString() {
 	String s = "{PERMISSION ERROR: " + goal.toString();
 	s += " - can not " + operation + " " + permissionType + " " + culprit.toString();
-	s += ": " + message;
+	s += ": " + msg;
 	s += "}";
 	return s;
     }

src/exceptions/SyntaxException.java

diff --git a/src/exceptions/SyntaxException.java b/src/exceptions/SyntaxException.java
index de45349..6edf661 100644
--- a/src/exceptions/SyntaxException.java
+++ b/src/exceptions/SyntaxException.java
@@ -29,14 +29,14 @@
     public Term culprit;
 
     /** Holds a string representation of detail message. */
-    public String message;
+    public String msg;
 
     /** Constructs a new <code>SyntaxException</code> 
      * with a valid type, its culprit, and message. */
     public SyntaxException(String _type, Term _culprit, String _message) {
 	type       = _type;
 	culprit    = _culprit;
-	message    = _message;
+	msg        = _message;
     }
 
     /** Constructs a new <code>SyntaxException</code> with the given arguments. */
@@ -45,7 +45,7 @@
 	this.argNo = _argNo;
 	type       = _type;
 	culprit    = _culprit;
-	message    = _message;
+	msg        = _message;
     }
 
     /** Returns a term representation of this <code>SyntaxException</code>:
@@ -58,7 +58,7 @@
 	    new IntegerTerm(argNo), 
 	    SymbolTerm.create(type),
 	    culprit,
-	    SymbolTerm.create(message) };
+	    SymbolTerm.create(msg) };
 	return new StructureTerm(SYNTAX_ERROR, args);
     }