Added MSSQL liquibase converter

modules/activiti-engine/src/main/java/org/activiti/engine/impl/db/ActivitiMSSQLTypeConverter.java

+package org.activiti.engine.impl.db;
+
+import liquibase.database.structure.type.BigIntType;
+import liquibase.database.structure.type.BooleanType;
+import liquibase.database.structure.type.DateTimeType;
+import liquibase.database.structure.type.DoubleType;
+import liquibase.database.structure.type.IntType;
+import liquibase.database.typeconversion.core.MSSQLTypeConverter;
+
+public class ActivitiMSSQLTypeConverter extends MSSQLTypeConverter {
+  
+  @Override
+  public int getPriority() {
+    return PRIORITY_DATABASE + 1;
+  }
+  
+  @Override
+  public BooleanType getBooleanType() {
+    return new BooleanType("tinyint");
+  }
+
+  @Override
+  public DateTimeType getDateTimeType() {
+    return new DateTimeType("datetime");
+  }
+
+  @Override
+  public IntType getIntType() {
+    return new IntType("int");
+  }
+  
+  @Override
+  public BigIntType getBigIntType() {
+    return new BigIntType("numeric(19,0)");
+  }
+
+  @Override
+  public DoubleType getDoubleType() {
+      return new DoubleType("double precision");
+  }
+}

modules/activiti-engine/src/main/java/org/activiti/engine/impl/db/ActivitiPostgres83TypeConverter.java

+package org.activiti.engine.impl.db;
+
+import liquibase.database.structure.type.DataType;
+import liquibase.database.structure.type.DateTimeType;
+import liquibase.database.structure.type.IntType;
+import liquibase.database.structure.type.NVarcharType;
+import liquibase.database.structure.type.VarcharType;
+import liquibase.database.typeconversion.core.Postgres83TypeConverter;
+
+public class ActivitiPostgres83TypeConverter extends Postgres83TypeConverter {
+  
+  @Override
+  public int getPriority() {
+    return super.getPriority() + 1;
+  }
+ 
+  @Override
+  protected DataType getDataType(final String columnTypeString,
+      final Boolean autoIncrement, final String dataTypeName,
+      final String precision, final String additionalInformation) {
+
+    DataType dataType = super.getDataType(columnTypeString, autoIncrement,
+        dataTypeName, precision, additionalInformation);
+    if (dataType instanceof NVarcharType) {
+      dataType = new VarcharType();
+      dataType.setFirstParameter(precision);
+    }
+    return dataType;
+  }
+
+  @Override
+  public IntType getIntType() {
+    return new IntType("integer");
+  }
+  
+  @Override
+  public DateTimeType getDateTimeType() {
+    return new DateTimeType("TIMESTAMP");
+  }
+}

modules/activiti-engine/src/main/java/org/activiti/engine/impl/db/ActivitiPostgresTypeConverter.java

 package org.activiti.engine.impl.db;
 
 import liquibase.database.structure.type.DataType;
+import liquibase.database.structure.type.DateTimeType;
 import liquibase.database.structure.type.IntType;
 import liquibase.database.structure.type.NVarcharType;
 import liquibase.database.structure.type.VarcharType;
@@ -10,7 +11,7 @@ public class ActivitiPostgresTypeConverter extends PostgresTypeConverter {
   
   @Override
   public int getPriority() {
-    return PRIORITY_DATABASE + 1;
+    return super.getPriority() + 1;
   }
  
   @Override
@@ -31,4 +32,9 @@ public class ActivitiPostgresTypeConverter extends PostgresTypeConverter {
   public IntType getIntType() {
     return new IntType("integer");
   }
+  
+  @Override
+  public DateTimeType getDateTimeType() {
+    return new DateTimeType("TIMESTAMP");
+  }
 }

modules/activiti-engine/src/main/java/org/activiti/engine/impl/db/DbSqlSessionFactory.java

@@ -104,8 +104,10 @@ public class DbSqlSessionFactory implements SessionFactory {
     
     TypeConverterFactory.getInstance().register(new ActivitiDb2TypeConverter());
     TypeConverterFactory.getInstance().register(new ActivitiMySQLTypeConverter());
+    TypeConverterFactory.getInstance().register(new ActivitiMSSQLTypeConverter());
     TypeConverterFactory.getInstance().register(new ActivitiOracleTypeConverter());
     TypeConverterFactory.getInstance().register(new ActivitiPostgresTypeConverter());
+    TypeConverterFactory.getInstance().register(new ActivitiPostgres83TypeConverter());
   }
   
   protected String databaseType;